In honor of Bobby Nash's sacrifice, the 118 comes together to dedicate the firehouse in his memory; when a billionaire tech giant is involved in a life-or-death emergency, the team must race to his aid.
As a geostorm ravages Earth, Athena and Hen's space mission teeters on the edge; on the ground, the 118 battles chaos when technology goes rogue.
Athena and Hen face increasing dangers in space as friends both near and far try to get them home safely; the 118 continues to help victims of the geostorm and falling debris.
As Athena and Hen navigate their way back home, Athena will be forced to confront what it means to live without Bobby.
The 118's beliefs are put to the test as they respond to emergency calls involving a jack-o'-lantern and a few more jump scares than they were expecting on Halloween.
Upon her return to shore, Athena's son finds himself in trouble with the law; Buck grows envious as Eddie forms a close bond with someone else; the team rescues a woman who's stuck on receiving a rose at an iconic mansion.
Hen and Karen welcome a new addition to their family; a call unfolds involving a person's limb that's taken on a mind of its own; Eddie and Marisol take a closer look at their relationship; Buck navigates his new feelings.
Maddie and Athena investigate a case surrounding an abducted mother and child; Hen and Karen learn more about Mara's family history; Eddie grapples with unresolved feelings for someone from his past.
After a victim of the apartment fire that changed Bobby's life resurfaces, he searches to make amends; driven by his need to right past wrongs, Bobby delves deep into memories of his childhood, unearthing moments from his fractured past.
The 118 and Tommy are presented with the Medal of Valor for their work on the cruise ship rescue; Hen and Karen encounter an unforeseen hurdle in their foster care journey; Eddie's emotional affair develops further.
Following the devastating fire at the Nash home, Bobby's fate remains uncertain; Athena embarks on a mission to uncover the truth; Hen and Karin engage in a heated custody battle; Christopher grapples with forgiving Eddie.