Hank and Karen's dinner party is derailed by Hank's botched marriage proposal to Karen, the revelation that Hank is likely the father of their friend Sonja's baby, and Lew's near-death from an allergic reaction to sushi.

Hank sets out to track down Lew's long-lost first love, and discovers that Sonja and her self-help guru boyfriend Julian have an "open" relationship; Mia spends a day trailed by a "Rolling Stone" reporter; Charlie's house becomes a porn set.