Annie and her friends are enjoying a lazy day by the lake when ominous clouds appear. In the scramble to escape the storm, Annie's cousin Gina goes missing. After a fruitless search in the rain, the teens call the police for help. But as the days pass without a trace of the lost girl, nerves fray, accusations begin to fly, and disturbing information about the relationships Annie holds so dear come to light. If a girl can't trust her best friends, who can she trust?