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 Kais thuggish philosophy. Meanwhile, while Daniels daughter Samantha finds herself in the middle of this conflict amidst false friends, Johnnys estranged miscreant son Robby finds himself inadvertently coming under Daniels wing and flourishes in ways worthy of Mr. Miyagi.
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 its too late with continuing his rivalry with Daniel LaRusso.