As lava takes over Los Angeles, the 118 works to evacuate scared and trapped citizens. Meanwhile, Athena runs into a familiar face as she searches for a way out of a collapsed tunnel, and Maddie is forced to make an impossible decision.
Fast-paced exploration into the high-pressure experiences of police, paramedics and firefighters who are thrust into the most frightening, shocking and heart-stopping situations. These emergency responders must try to balance saving those who are at their most vulnerable with solving the problems in their own lives.