Things are slow for Burlington, Vermont, private investigator Hack Loomis, so he agrees to look into the disappearance of his assistant's friend Belle Ryerson. Belle went missing after attending a meeting of a UFO group run by a charismatic psychologist and disarmingly beautiful woman who claims to be in contact with an alien mothership. Eccentric as the true believers may be, Loomis soon learns that it's the people they believe in who are really dangerous.