Forced into early retirement by a degenerative illness, former baseball player Ray Waller moves into a new house with his wife and two children. He hopes that the backyard swimming pool will be fun for the kids and provide physical therapy for himself. However, a dark secret from the home's past soon unleashes a malevolent force that drags the family into the depths of inescapable terror.

Nate Shepherd, late 40's, and Jenny Sparks, early 30's, meet in a fancy New York eatery. Complete strangers who have had a rotten day, waiting for their better halves, they reveal to one another that they are going to meet new people tonight. They quickly realize they are waiting for each other. When Nate loses his girlfriend (after getting fired from his cushy job at an ad agency) and Jenny loses her boyfriend to a drug overdose, Nate's girlfriend suggests that they should move in together as friends to split the rent and ease each others pain. As their friendship grows into something more, their relationship becomes a loving but complicated experience.