A single guy suffering from a bad case of heartache invites an outwardly ideal couple to share his stylish apartment, only to second-guess his decision when the couple proves clueless about personal boundaries. Suddenly single after being dumped by his girlfriend during his marriage proposal and left in a lonely apartment when his roommate moves thousands of miles away, Scott (Brandon Routh) invites amiable strangers Ryan (Jessee Bradford) and Mary (Sophia Bush) to move in. When Ryan and Mary begin intruding on every aspect of Scott's life, including his burgeoning relationship with beautiful dream girl Leslie (Jennifer Morrison), Scott begins to wonder if the couple needs a third wheel to keep their relationship coasting.