In 1960 New York City - the high-powered and glamorous "Golden Age" of advertising - Don Draper, the biggest ad man in the business, struggles to stay a step ahead of the rapidly changing times and the young executives nipping at his heels.

Pete returns from his honeymoon, excited about his new marriage, but conflicted about his past encounter with Peggy. After his business relationship with Rachel takes an unforeseen turn, Don attends a party which further illuminates his increasing dissatisfaction with his present life.

Pete's professional and personal lives become more complicated as he struggles to assert power in both. While facing pressure from his wife regarding a new apartment, he further alienates Don and endangers his own position at Sterling Cooper.

Peggy is given a difficult assignment. Roger's work problems provide new opportunities for Don, and Pete grows more frustrated. Betty finds a new outlet for her growing dissatisfaction.

The office scrambles without Don; Betty learns some disconcerting news.

Sterling Cooper receives a surprise visitor; Sally has been spooked by something (or someone); and Joan receives some shocking news.

Peggy's taste in men proves questionable. Pete has to make a big decision about his career and a candidate makes a big impression on Don.