Callie's sister is driving Adam and Callie crazy, and Callie has Adam get her a job where he works. Predictably, the situation worsens when she starts fooling around with Adam's boss. Ethan saves Lisa's life, and Mike seeks a way to pay him back.

Lisa gets assigned a project that takes her out of town with an improper co-worker, so she recruits Callie as a photographer to hopefully curb his behavior. Adam takes advantage of a work assignment to make up for ruining Mike's original bachelor party, but he soon loses control of the party.

Mike and Lisa ask Adam and Callie to watch Tommy so they can have a night to themselves. Adam tries to curb Callie's quick temper. Ethan thinks he has found his soulmate.