Plot

Decades after their 1984 All Valley Karate Tournament bout, a middle-aged Daniel LaRusso and Johnny Lawrence find themselves martial-arts rivals again.

Thirty years after their final confrontation at the 1984 All Valley Karate Tournament, Johnny Lawrence is at rock-bottom as an unemployed handyman haunted by his wasted life. However, when Johnny rescues bullied kid Miguel from tormentors, he is inspired to restart the notorious Cobra Kai dojo. However, this revitalization of his life and related misunderstandings find Johnny restarting his old rivalry with Daniel LaRusso, a successful businessman who may be happily married, but is missing an essential balance in life since the death of his mentor, Mr. Miyagi. Even as this antipathy festers, it finds itself reflected in their protegees as Miguel and his comrades are gradually poisoned by Cobra Kai's thuggish philosophy. Meanwhile, while Daniel's daughter Samantha finds herself in the middle of this conflict amidst false friends, Johnny's estranged miscreant son Robby finds himself inadvertently coming under Daniel's wing and flourishes in ways worthy of Mr. Miyagi.—Kenneth Chisholm (kchishol@rogers.com)

Season 2: After a shocking winner of the All Valley Karate Tournament, things have changed with old foes and new bullies. But Johnny realizes he made Miguel and his friends too badass as they slowly turn into the bullies of West Valley High School, and he must change them back to how they were before, or it's too late with continuing his rivalry with Daniel LaRusso.

Season 3: After Johnny Lawrence is blamed by Kreese for Miguel's serious injury, he's now betrayed and is not working with Kreese anymore. Johnny must take down Kreese and get the Cobra Kai members such as Hawk, Mitch, Burt and more fighters too take down Cobra Kai, but Daniel LaRusso gives Johnny an offer to work together.

34 years after losing to Daniel LaRusso in the All-Valley Tournament, Johnny Lawrence has hit rock-bottom with his life. After reluctantly saving his teenage neighbor Miguel Diaz from a group of bullies, Johnny decides to reopen the Cobra Kai dojo, and Miguel quickly becomes his star student. Johnny finds renewed purpose in his life and a chance to recapture his glory days, but his actions inadvertently revive his old rivalry with Daniel, who is now a successful car-dealership owner who has been struggling to find balance in his life and with his family following the death of his longtime friend and mentor Mr. Miyagi some years prior. As his rivalry with Johnny worsens, Daniel opens the Miyagi-do dojo to counteract Cobra Kai and takes in his daughter Samantha and Johnny's estranged son Robby Keene as his star students. Daniel and Johnny are eventually forced to face the consequences of their mutual animosity as their rivalry trickles down to their own students, and familiar faces from the past emerge to fan the flames.—No One