Bill Richardson has his hands full representing the McCullough's in the custody case, much to Izzy's dismay. Lexie finds out upsetting news and turns to Pearl for help. Meanwhile, Elena – feeling as though this whole custody battle is her fault – goes to New York to search for clues about Mia's past and enlists the help of an old acquaintance.

Mia, Bebe, and lawyer Ed Lan prepare their case against the McCulloughs. Izzy grows closer to Mia over a shared experience while her relationship with Elena reaches a boiling point. Bill and Elena's marriage is tested. Trip and Pearl continue to explore their relationship while Lexie and Brian consider ending theirs.