James Roday Rodriguez, Dulé Hill, Timothy Omundson, Maggie Lawson, Kirsten Nelson, and Corbin Bernsen reprise their roles from the series as Shawn Spencer, Burton Guster, Carlton Lassiter, Juliet O'Hara, Karen Vick, and Henry Spencer, respectively. The film follows Shawn and Gus's attempt to track down Selene's estranged husband, Alan Decker, with unexpected consequences that lead to a shotgun wedding.