It’s a life-and-death situation when a young boy falls into water pipes beneath the city of Seattle. With the clock ticking, the firefighters of Station 19 jump into action to save his life.

Following a deadly blaze inside a coffee beanery, the members of Station 19 find themselves on high alert as a beloved member of their team lands at Grey Sloan, leaving the future uncertain in the face of a life-threatening situation.

The crossover starts on Grey's Anatomy S15E23 What I Did for Love (I)

The Station 19 crew battles a storage facility fire with growing complications, and Dr. Jackson Avery pops over from Grey Sloan and ends up collaborating with old pal Ben Warren.

After a terrifying lightning strike, the Station 19 crew works overtime to extinguish the fire at Meredith Grey's home. Meanwhile, Maya is rushed to Grey Sloan Memorial Hospital due to a medical emergency.