A New York City woman unwittingly accepts a psychotic roommate who begins emulating everything about her. By the time the unsuspecting woman glimpses her new roommate's bad side, it's already too late to change the locks.

Mentally unstable New York carpenter Roger Greenberg (Ben Stiller) temporarily relocates to Los Angeles to house-sit for his brother Phillip and forms a bond with Phillip's assistant Florence as he attempts to reconnect with old friends. When he's not penn (more…)Mentally unstable New York carpenter Roger Greenberg (Ben Stiller) temporarily relocates to Los Angeles to house-sit for his brother Phillip and forms a bond with Phillip's assistant Florence as he attempts to reconnect with old friends. When he's not penning consumer complaint letters or building a doghouse, Roger reaches out to his former bandmate Ivan, who's never quite gotten over the fact that Roger blew their one shot at the big time.

A New York City woman unwittingly accepts a psychotic roommate who begins emulating everything about her. By the time the unsuspecting woman glimpses her new roommate's bad side, it's already too late to change the locks.