Sam’s old love awakes from a 20-year coma. This makes Delinda the casino host for a whale visiting town whith his three wives. Things complicate when Mike falls in love…

Alan finds out that Charlie stole his girlfriend and works on a plan to get back at Charlie, even though this happened when they were in high school.

Don makes some new friends on his trip to Los Angeles; Peggy looks for romance; Duck ponders the future of Sterling Cooper.