Two new recruits join the emergency services and work with older, wiser partners. Davis becomes a policeman like his father and Carlos a paramedic. Two other paramedics, Bobby and Kim, find themselves rushing from emergency to emergency. Bosco and Yokas, the other police officers, and Jimmy and his fellow firemen have their own crisis to deal with.

Doc, Carlos and Ty each feel guilty about the mistakes they made during Jerry's shooting, the squad rescues a man dangling from the side of a skyscraper after an explosion; Fred wants Faith to quit her job. Elsewhere, Sully's contacts on the street pinpoint an abandoned building as the location of Jerry's shooter, and Bosco takes the shooter down.

The feud between Doherty and Bosco escalates, Doc and Nieto seek the owner of an expensive watch, and Zambrano agrees to date Doherty.

Davis finds a decomposed body and a young rape victim, a teen prostitute makes a victim out of Kim, and Bosco battles Doherty over a parking spot.

Doc is saddened to hear that Jerry has decided to take a disability retirement, Jimmy and Bobby take out their conflict over Kim and Joey in a game of one-on-one, Sully and Ty arrest a purse snatcher, who will do anything to stay in jail once he discovers that his victim's son is a mobster. Elsewhere, Faith ensures justice is done to a criminal responsible for the deaths of two little boys.

Doherty risks his life when a rookie is lost inside a burning building, Sullivan and Davis track a stalker, and Bobby visits his jailed brother.