When David, Andrea, Mark, and Tammy go on a cruise together, David and Andrea unexpectedly rekindle their romance. Mark's preoccupation with reeling in a big fish to outcompete Steve DelVecchio leads to him catching a whale that jeopardizes the safety of the entire cruise. Meanwhile, Hank goes on a date with a mermaid that goes awry when she reveals her distaste for hot dogs.

Mark, in an attempt to bond with his stepson Darren, insists on teaching him how to throw a handmade boomerang that was gifted to Darren by his father. The two soon find themselves on a trek deep into the Jersey woods in search of it, where they encounter the Jersey Devil himself. Meanwhile, David is the recipient of a sex doll that he swears he didn't order, and is put through the wringer trying to return it.

Mark buys himself a Superbowl ring and leverages it to get special treatment at the Eagles game; Hank has an adventure with cutting-edge mascot technology.