Decades after losing the 1984 All Valley Karate Tournament, a down-and-out Johnny Lawrence is tired of living in the shadow of his successful former rival Daniel, and decides to reopen the Cobra Kai Dojo. 

Daniel is dismayed to find a new Cobra Kai dojo has been opened up. Johnny learns his dojo has to pass several safety requirements before he can actually start teaching. 

Miguel helps Johnny advertise Cobra Kai on the web. Daniel agrees to chaperon at the Halloween dance so he can keep an eye on his daughter. 

Robbie lands in hot water with his father, while Johnny considers shutting down Cobra Kai after Miguel is injured. Samantha and Kyler's relationship hits rock bottom. A vandalised billboard creates tension for Daniel. 

Daniel uses underhanded tactics to try to drive Johnny out of business; when Miguel defends Samantha's honor at school with his new karate skills, the resulting viral video drives a new wave of enrollment at the Cobra Kai dojo. 

Johnny's dojo class attracts a group of misfits while his son Robby, who harbours ulterior motives, lands a new job. Samantha makes a new friend in science class. Daniel inspires interest in karate from an unlikely person

When Johnny learns Cobra Kai is banned from the all Valley Tournament, he faces the city council. Miguel asks Samantha out. Robbie takes lessons from Daniel, just as his buddies plot a heist from Larusso Auto.

Helping his students prepare for the tournament inspires Johnny to clean up his own act; Daniel's cousin vandalizes Johnny's car, leading to a confrontation between Johnny and Daniel at the LaRusso residence.

Louie's reckless actions force Johnny and Daniel to take a trip down memory lane. The Cobra Kai stupidents plot revenge against the popular kids. Miguel grows impatient with Samantha.

Johnny teaches his students  the third rule of the Cobra Kai on the day of the 2018 All Valley Karate Tournament, and Robbie signs up unafiliated. A family face from the past shows up.