Fiona and Gus navigate the awkwardness of their quickie wedding, but her plans to announce the marriage at a family dinner unravels when a coworker overdoses on heroin. Meanwhile, Frank avoids an irate Sammi; Debbie trains at Derek's gym; Mickey grows more concerned with Ian's erratic behavior; and Lip decides to head back to school early.

Ian gets upset when he learns he is under a mandatory 72-hour hold at the psych ward; Frank returns home from the hospital and refuses to apologize to Sammi; Jimmy and Gus have a face-to-face meeting about their futures with Fiona; Lip discovers he never filled out his financial aid forms and now owes thousands in tuition; Debbie tries to get out of the "friend zone" with Derek.