Meg returns to Los Angeles and notices that Violet and Pete have grown closer; Kevin questions where he and Addison are headed as a couple; Cooper treats a young boy with a mysterious past.

Addison suspects that Archer is up to his old tricks; a patient's child is born with male and female reproductive organs; Violet and Sheldon co-lead a therapy group for couples.

Addison and Sam go for a hike in Malibu, they come across an expecting couple trapped in their car after an accident, they then perform urgent field care. Charlotte, Cooper and Violet treat a newlywed who, on his wedding night has taken too much Viagra. Pete and Sheldon go out to a bar together and end up falling for the same girl.

When Addison's patient and the life of the three unborn babies she is carrying as a surrogate hang in the balance, Sam's new girlfriend, Vanessa, and Addison are sharply divided on the course of treatment. Meanwhile Cooper seeks Sheldon's help with a young patient, but their personal quarrels over Charlotte get in the way, and Naomi has a dilemma of her own between William and an unexpectedly charming Dr. Fife.