Addison and her family at the practice face a whole new set of challenges as Addisons decides she wants a baby, with or without Sam. Pete's health scare puts a strain on his marriage to Violet, Charlotte's past comes back to haunt her and Amelia succumbs to her destructive habits. Plus, with the arrival of an attractive new doctor and the discovery of Cooper's illegitmate son, the doctor's relationships are pushed to the limit.