Johnny works overtime at Squad 8 and is reunited with his old training partner Stone, who is now Captain of Station 8. A construction worker dies from a heart attack due to the Squad being unavailable for 10 minutes. Back at Station 51, the firefighters check a water flow alarm and an explosion occurs, injuring Chet. At Rampart, Dixie calls and asks the X-Ray lab regarding Dr. Early admitting Chet, who needs evaluation. A tree surgeon is hit by a tree and suffers a collapsed lung. The Squad then assists a boy who fell from a tree due to being exposed to Rocky Mountain spotted fever, from a tick, and a fire at a fireworks warehouse injures Roy.