In preparation for a shotgun wedding before the birth of Baby Guster, Shawn and Groomzilla Gus go rogue in an attempt to track down Selene's estranged husband, as Lassiter grapples with the future of his career.

As Gus and Selene prepare for their wedding and the arrival of their son, Shawn and Gus face the challenge of tracking down Selene's estranged husband, with Gus slipping into 'groomzilla' mode. Meanwhile, Lassiter, after recovering, contemplates the next steps in his police career.—Oscar Serpa