The agency's Christmas party is nearly spoiled by the late arrival of a surprise and not-so-welcome visitor.

When Pete receives an edict from Roger and Lane, he finds himself confronting personal dilemmas at work and on the home front. Meanwhile, Peggy befriends Joyce, a photo editor at Life magazine, who invites the copywriter to a party at a downtown loft, where Peggy gets hit on from a number of sides. And Faye's self-deprecating remarks at a focus-group meeting don't sit well with Don.