Introduction: "You met up in Rome with Prof. Armitage and he gives you the golden Amulet of Hydra that you found in the Yucatan. He had brought it to show to some friends at the Vatican and now he wants you to return it to the vault in Miskatonic University's special antiquities collection. The Professor heads off to meet the royal family in Romania and discuss your discoveries in Transylvania. Meanwhile, his assistant Randolph Carter heads off to survey the mines you discovered in Visoko.
You all board the ship bound back to the US from a port in Naples. As you head toward Corsica and Spain that evening an ominous wind and high waves begin to thrash the ship just after the Italian coastline disappears into the horizon. After several hours of desperately clinging to the walls and doorways below deck you finally hit something. The ship rolls over onto it's side on some sort of rocky outcropping, moments before it breaks in half and begins to sink beneath the waves.
As you escape the wreckage of the ship in the dark night skies, you see a lighthouse beacon on the horizon. You look around and see your friends sinking and splashing about desperately in the mad waves."
When the party arrives ashore, Madeline has the Amulet of Hydra. Conell is nowhere to be seen along with Outback Jack, who is also missing. As they cough us seawater and stumble ashore in the light of dawn, they see a woman running across the beach pursued by a man and a woman with knives who are trying to attack her.
They defend the woman with the baby and Herbert West's energy field burns the woman attacking with the knife and she dies. The woman with the child runs to the beach and throws her baby into the sea. Madeline dives in after the child, but seems to see it swimming away from her deeper into the ocean. She loses the baby behind some coral. They tie up the other man with the knife along with the mother in a nearby home.
In the backyard herbert west digs a shallow grave and dumps the body. Then he retrieves one of his syringes of re-animator fluid and brings her back to life. Her body is badly burned and while restrained she still gasps horribly and flails around in agony. Herbert West uses his shovel to put the undead beast out of its misery.
Heading into town they spy some docks. There they meet some fishermen but few speak any language they know. They find some golden statues among some crates on the docks and steal some of them. The also see great scratches and bite marks from some large sea creature on the dock. Finally they find a sailor who speaks french and he tells them to go to the main square and find Dr. Matsya.
in the main square they see a scaffold with a bell on it. A deep ocean pool with some sort of crab statue with a diamond in its claws submerged in it. A squat temple structure and the mansion belonging to Dr. Matsya.
In the home Dr. Matsya's butler, maid and wife welcome the party. They tell them about the shipwreck and are invited to stay as long as they wish until they find their way home. Mrs Matsya insists that they must stay for diner and makes living arrangements in the servants quarters.
While in the cellar selecting wine they notice that there is a heavy metal door in the basement. They inquire and the butler tells them its the insane son of Dr. and Mrs. Matsya and that it would be impolite to mention as its a sore subject.
Regina follows the butler into the kitchen and finds a great crab creature in a pot. She helps the butler subdue it so it can be cooked for dinner.
Madeline learns from the maid that there are several pygmie natives called Tcho-Tcho's living in the Dr's home and that they are trying to civilize them, treating them as children. Herbert West explores the library and learns about the expeditions of Dr. Matsya through his writings.
At dinner later in the evening they are told Dr. Matsya is ill and cannot attend. The tcho tchos arrive and exhibit terrible table manners. One of them throws a bone at Sadie, who reacts violently drawing her pistol. Mrs. Matsya insists they leave, but the party apologizes and she lets them stay though Sadie and Prof. Greyson go to stay with the priest in the temple near the square for the night so as not to cause further offense.
After dinner, regina goes to investigate the basement again. Sister Christy goes to take a nap, Madeline goes with Mrs. Matsya to put the tcho'tcho's back in their rooms and herbert west treats the bite he received from one of the natives he tried to examine after dinner.
All hell breaks lose. A shambling horde of townsfolk, half fish, half man hybrid beings shuffle into the town square and surround the church and the mansion clamoring toward the doors. Sadie runs across the square diving through a window and capping a townsfolk on the way. The mob flows through the broken window into the home.
Downstairs Regina awakens the mad son in the basement and he breaks through his door. He snaps the neck of the maid and chases Regina into the main hall. She tries to run outside but sees the mob and barricades the door. The butler begins to wrestle with her to reopen it so the townsfolk can enter. Herbert West using his power field to blast the insane hulking son of dr. matsya, a green muscular monstrosity with arms covered in bulging veins.
Madeline comes with Mrs. Matsya to the study where she meets Dr. Matsya, a terrible looking being with tentacles coming out of his body and a deformed face. She tries to flee but Mrs. Matsya tries to restrain her. A fight ensues and Madeline kills Mrs. Matsya. The tcho-tchos become angry and cast some spells at her.
Meanwhile Sadie and Regina fight off the horde in the lobby, shooting and hacking away at them. Sister Cristy awakens to find that Dr. Matsya is calling to her and mysteriousy claims to be her brother. She sees his terrible shape and is alarmed. He casts a spell that fills her lungs with water and carries her away. Herbert West grabs a molotov cocktail he has constructed and follows after them.
When christy begins to drown she finds she has gills and begins barfing up the water again. Dr. Matsya drops her and attack west but is driven back by his energy field. West drops the molotov in the ballroom and sets the house on fire. He takes christy in a dreamlike state to one of the rooms where she will be safe and he charges downstairs.
Prof. Greyson was restrained by the priest who used a spell to crush his heart and cripple him so the mob could tie him up, but he used his wither spell to free himself by killing the priest and retieved his tommygun so he could gun the remaining townsfolk outside down. One surviving cultist rang the bell on scaffold outside. Not waiting to see what was awakened, the prof. retreats inside to join the survivors in the main hall.
A moment later the large statue looking crab monster crashes through the main door. Herbert west and Prof. Lawrence dispatch the creature after a short battle. The horrible thing slumps to the floor. Herbert West resurrects Sadie and Regina but their hearts don't restart so they are now undead.
They head back to the house on the beach but find that the mother and the man who was chasing her are both gone. They head in the other direction to the lighthouse. There they find the lighthouse keeper is a friendly deep one hybrid who was the father of the child who was thrown into the sea earlier. He tells them that all their questions can be answered in the sea cave of Ghar Dalam which can be accessed at low tide further down the beach.
They go to the cave and find it is full of deep ones, including a massive Deep One named Dagon. He demands the amulet of Hydra from them which Madeline gives willingly. He offers them gold and the Maltese Falcon, a jeweled statue containing a map to Shangri-La in the Himalyas.
He tells them that Nyarlathotep is his nemesis, and he wishes for them to mount an expedition to Shangri-La to retrieve an artifact, an idol of Cthulhu, for him. He gives the party spells to summon Deep Ones and Dagon himself if they need them and he gives them a crew and ship to take them to India. The party accepts his offer.
