Fire chief Kev returns to duty after receiving serious injuries at the hands of arsonists.

It's the morning after the night before and morale is low as the team launch a risky rescue attempt. Plus, Little Al gets in over his head at a cage fight.

It's the one-year anniversary of the Churchill Estate fire and, while Dennis reaches breaking point, information comes to light that could lead Kev to the truth.

The firefighter drama goes out with a bang in the last episode of the series. Following the Blackwall Tunnel explosion, Kev takes drastic measures to move on.