The 118 race to save the lives of workers trapped in a five-alarm factory fire. Meanwhile, Maddie reveals a painful family secret that causes Buck to confront his childhood and answer why he is the daredevil he is today.

The 118 race to the rescue when a birdwatcher is trapped under a tree. Chimney is in for a wild ride when he tends to a drunk driver; Maddie helps a mother and her young daughter when an abusive father shows up at the their house; Eddie catches Christopher in a lie; Buck begins a year of "yes to possibilities" and immediately receives an interesting proposal from a former roommate.

Athena and the 118 race to the rescue when a fading movie star is plagued by a series of near-death experiences.

Despite the case being closed, Bobby is determined to prove his AA sponsor was murdered and bring his killer to justice; Meanwhile Buck struggles with his post-traumatic stress.

A series of freeway car accidents leads to a catastrophic overpass collapse that endangers the lives of civilians and members of the 118.