Frank gets into trouble with two goons he owes money. Fiona asks Sheila to take care of Liam while she spends a night with Steve, and Ian tries to stop Mickey from bullying Kash.

Lip tries to get back in Karen's good graces by crafting a prenuptial agreement for her and Jody, while Ian continues to give Lip the silent treatment; Frank wants to kick Grammy out but Fiona resists until the basement meth lab explodes; Fiona is invited on a boat trip but doesn't realize Steve and his girlfriend are also attending.

Fiona's series of bad decisions involving Robbie finally boil over. Meanwhile, Frank and Sammi pursue a cure for Frank's liver trouble and try to catch up on missed father-daughter time; and Lip gets a surprise visit at college from Army investigators.

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.