Joe fears that being a nanny will prevent him from having a love life. Mel is worried that a depressed Joe means no more gourmet food so she lies to help him get a date with her former sorority sister. Joe needs to keep the lie going to help out Mel in her job.

Mel hears something in the attic but when she goes to investigate it is the last thing she expected.

Mel has an important deal with a Japanese businessman and asks Joe to teach her Japanese. When the businessman's son arrives in his place and speaks no English, Joe has to translate between the two. When the Japanese businessman develops a romantic interest in Mel, Joe sabotages the translation. Meanwhile, Lennox is forced to work with her ex-best friend on a school project, and Ryder tries to mediate.

George has a party to introduce Mel to his friends. Meanwhile, Joe gets upset at his ex-wife for disrespecting their anniversary.

Joe's younger brother visits and takes an interest in Mel.

Mel and Joe attempt to respect each other's privacy after they have a quarrel about boundaries. Elsewhere, Lennox dreads working on the spirit committee at school, but her attitude changes after she meets the president of the club, Aidan (Cody Linley).

After Lennox breaks up with her new boyfriend, Mel starts dating his father behind her back. Joe tries to teach Ryder a lesson about how to invest in the stock market.