Frank teaches Debbie how to work the system. Kev and Veronica visit Yanis.

Sean moves into the Gallagher house as Fiona plans a traditional wedding.

A confrontation between Sean and Frank quickly descends into a brawl.

It's wedding day and Frank shows up uninvited - and high.

Kevin, Veronica and Svetlana start a topless maid service. At the shelter, meanwhile, Frank makes new friends to replace his old family - leading them to a for-sale house converted into the Gallagher Home for the Homeless. Plus, Debbie's new lifestyle comes to an abrupt end; Carl gets a syphilis scare; Ian struggles with a breakup; and with Fiona on the run to clean up after her siblings, business at Patsy's hits the skids.

Frank worries that he and his new family will lose their Home for the Homeless shelter, so he plans a little goodwill for the neighborhood. Meanwhile, Fiona drums up business by throwing a speakeasy party at Patsy's Pies.

Frank learns that a billionaire philanthropist has bought the homeless shelter and he and his clan can stay. Meanwhile, Fiona gets smart financial advice from a Tinder hookup as Ian struggles with his feelings for Trevor.

Fiona sees opportunity in a laundromat for sale and decides to invest. Frank revels in the good fortune of his scam, but the troops catch a whiff of foul play. Meanwhile, Kev and V discover a shocking secret about Svetlana's father.