The Gallaghers find themselves with money to burn as Carl sells their inheritance from Monica. Fiona swears off random hookups to focus on her new apartment building. Lip deals with the sacrifice that comes with sobriety. Frank emerges out of a meth-induced haze to make amends for decades of depravity.
Libby and Frank are supposed to be getting married, but this is put on hold when Frank disappears on his stag night. Mimi tries to find out the identity of the father of her new baby Cilla.