Scott Teller's life is turned upside down when he meets Ryan and Mary, a seemingly perfect couple who move into his apartment and his life. He quickly becomes their third wheel. But when Scott meets the girl of his dreams in Leslie he believes that Ryan and Mary are intentionally sabotaging his chances with her because they desperately need him in their life to hold their dysfunctional relationship together.

Thea Clayhill is the reckless secretary of arrogant publisher Jerry Steinwald. When Jerry fires her having had an accident with his beloved dog, Thea lies and tells him that she is four-months pregnant. Thea lost her parents in a car accident and raises her younger sister Emma alone and can not afford to lose her job. Jerry goes on vacation to be with his dog and his brother Nick Steinwald assumes his position. Thea decides to fake her pregnancy for more time with the support of her friend Lisa.