Frank re-lives his 20s and joins the workforce for the first time! Fiona grapples with evicting someone from her building. Lip works out a plan to sabotage Charlie's chances with Sierra. Ian and Carl make a troubling discovery about Monica. Kev says his goodbyes as he prepares to go under the knife.

A blast from the past shakes up Fiona's view of her life. Frank gets involved with Liam's school and becomes the most popular dad in the PTA. Lip learns getting laid is harder than anticipated when sober. Ian crosses a boundary with a kid from the youth center. Kev and V take a trip to meet his birth family.