When a serial rock-thrower causes a fatal car crash, the team is determined to bring him to justice. Then, Chase risks his career to grant a mother's dying wish, while a potential recruit to the Rescue team has a dangerous obsession with Lara.

When a boat skipper goes missing after a tragic ferry accident, Dean becomes obsessed with finding him — dead or alive. Heidi vows to uncover the identity of a mysterious young "Jane Doe" who died suddenly after a ferry disaster. Meanwhile, Dean and Chase face some home truths when their father introduces his sexy young girlfriend.