After Scott's (Routh) girlfriend dumps him and his roommate moves away, he meets seemingly perfect couple Mary (Bush) and Ryan (Bradford) and they move in. Without any concept of personal boundaries, the duo are soon taking over Scott's life, which becomes a big problem when he falls for Leslie (Morrison). Mary and Ryan don't want any interference in their perfect arrangement, which complements their dysfunctional relationship, and try to sabotage the romance (in a funny, not horrific way).