Billy Murphy enlists the help of Conor, Jock, and eventually Mairéad, to avoid getting killed by a former cellmate of his who has just been released from prison.

The baby is due and everyone is frustrated with the nonstop arguing of both families, so an ill-advised weekend break for all is organised.

Conor and Jock get roped into an amateur heist masterminded by Billy Murphy, but drafting in baby Star causes chaos.