Fiona's homeless tenants barricade themselves inside her apartment. Lip takes in a terrified Sierra and Lucas when her father is released from prison. Meanwhile Ian, despite warnings, provides sanctuary to a runaway teen, Frank considers his retirement and Debbie must choose between paying for school and paying for surgery to keep her toes.

Fiona taps deep into her Gallagher roots to get the homeless family out of her apartment and dismiss their lawsuit. An explosive incident sends Ian and some of his followers into hiding from the authorities. Meanwhile, Lip makes a difficult decision in order to have the life he really wants, Carl looks for a way to go back to school without upsetting Kassidi, Debbie considers letting Derek back into Franny's life and Frank makes plans to take advantage of Liam's rich friend. Season finale.