Cthulhu is a 2007 American horror film directed by Dan Gildark and cowritten by Grant Cogswell and Daniel Gildark. The film is loosely based on the novella The Shadow over Innsmouth 1936 by H. P. Lovecraft.
When young history professor Russ is called upon by his sister to execute their late mothers estate, he is reunited with boyhood friend Mike, and with his father, the charismatic leader of a New Age cult. While exploring his memories, Russ wanders into a warehouse where hundreds of names are listed on the walls. As he sleeps that night, he dreams of a stone cudgel and awakens to find a cudgel in his motel room the town drunk warns him that it is an instrument of sacrifice. A young liquor store clerk enlists him to help find her brother, whom she believes has been taken by the cult. Russs aunt, who has been living in an asylum, tells him that his mother left a message hidden in her house.Looking for answers in the warehouse, Russ is taken on an unbelievable journey through the small towns ancient, subterranean origins. When he escapes, he and Mike find the girls brother murdered. Russ begins to believe preparations are underway for a mass sacrifice, and engages the attentions of a seductress in order to obtain information. He is raped and arrested for murder on the eve of the May Festival. The stakes are raised when Russ discovers that the cult intends to take over the world by raising anthropomorphic creatures from the sea. ........
Source: Wikipedia