A young woman is followed by an unknown supernatural force after a sexual encounter.

Cora spends her days begrudgingly answering phones at a Prayer Call Center under the watch of well-intentioned leader Bill. When a caller shows up convinced he's been saved by her voice, she must decide if she's the one he thinks she is.

When carefree teenager Jay sleeps with her older boyfriend for the first time, she learns that she is the latest recipient of a fatal curse that is passed from victim to victim via sexual intercourse. Death, Jay learns, will creep inexorably toward her as either a friend or a stranger. Jay's friends don't believe her seemingly paranoid ravings, until they too begin to see the phantom assassins and band together to help her defend herself.