On her private island, Scarlett guards Electric Eel Manor, the family’s forbidden estate. She promises her daughter, Shelly, she can enter the manor after graduation. After graduating, Shelly invites three friends to visit the island—but all three mysteriously disappear while Scarlett is hosting them. Determined to find out what happened, Shelly breaks into the manor and uncovers a secret her mother has kept hidden for 20 years.