In the aftermath of the Zabel Ridge fire, Station 42 faces internal turmoil but must rally together for a high-stakes rescue that tests their strength, loyalty and the future of the firehouse.

Station 42 faces a high-stakes wildfire situation that tests their unity, leadership and personal resilience; the new battalion chief is on site, but he has a polarizing leadership style that gets under everyone's skin.

The Station 42 team responds to a dangerous zipline accident that escalates into a wildfire due to illegal fireworks; Sharon struggles with letting go of Vince's belongings and unexpectedly finds comfort in Vince's ex, Renee.