The paramedics and Rampart Hospital face serious medical challenges with multiple simultaneous emergency cases both being radioed in and when two biker gangs arrive together as casualties of a major gang fight.

While Station 51 and Rampart Hospital break in their new equipment, Roy and John purchase a vintage fire engine from a junkyard.

Returning from a fishing trip, Roy, John, and Chet help the victims of a car accident. On duty, after rescuing some joyriders whose car went over a cliff, John is bitten by a rattlesnake.

As Roy contemplates leaving the paramedics to accept a promotion to Engineer, Squad 51 is occupied with the usual work such a major fog caused multi-car pile-up.

Dissatisfied with a young intern's arrogant attitude towards paramedics and accident victims, Dr. Brackett orders him to ride with Squad 51 for a day.

John and Roy think about going into the floor cleaning business on the side. A hermit is trapped in his cave home. Dr. Morton treats a famous singer. John is injured on a high rescue, and the station battles a chemical warehouse fire.