In LA, the personal struggles of various emergency responders burden their shoulder during their frequent rush to save those in crisis. Abby Clark, a 911 operator, cares for her demented mother. Sergeant Athena Grant deals with the end of her marriage.
A rescue mission at an amusement park leaves Buck traumatized. A 911 call turns out to be more than Athena and Hen expected it to be. Tragedy strikes at the heart of Athena's home.
The 118 is shaken to the core when one of their own gets in a serious accident. Athena deals with the ramifications of May's suicide attempt.
It's all hands on deck when a major tragedy strikes LA. Bobby goes on a downward spiral. Athena faces serious ramifications after she takes drastic measures to protect her daughter.
Abby races to find her mother after the latter wanders off. Bobby reveals his tragic past to a priest. Hen's ex-girlfriend contacts her, bringing conflict into Hen's marriage.
Athena struggles to calm down a frantic woman who committed a murder. Abby and Buck grow closer, but their first date is derailed by an unexpected medical emergency.
Abby is drawn into a police investigation after one of her callers get murdered. The return of her ex-girlfriend threatens to unravel Hen's life.
The 118 receives a series of calls dealing with those suffering cosmic punishments for their actions. Bobby sees a chance to atone for his mistakes. Athena tries to move on from her crumbling marriage.
Buck entertains doubts about his relationship with Abby. Hen gets embroiled in a bitter custody battle with her ex.
Abby makes a sudden decision in the wake of a tragedy. Bobby and Athena connect over shared experiences. Hen tries to reconcile with her wife.