After seeing his young son Joey fall and break his arm in a playground accident, Jimmy fights through a burning apartment building to save a frightened boy of Joey's age. Meanwhile, a guilt-ridden Doc can't stay away from a recuperating teenager, Ryan Buckley, who was accidentally paralyzed while under Doc's care. Taylor is annoyed by a new probationary firefighter, Ken Prescott. Bosco and Yokas search for a drug addict who murdered his girlfriend.

Bosco tries to protect an old ESU sharp shooter from spiraling out of control. Faith contemplates taking the sergeant's exam. Davis and Taylor have a steamy affair. Doc feels the guilt over a mistake that made a boy a paraplegic.