Sam and Robby turn to their friends for support as they train for the challenges ahead. Johnny and Carmen welcome a new addition to the team.

As the moment of truth arrives, Daniel and Johnny confront their pasts. Then it's fight time as Robby battles Axel in the world karate championship.

The action heats up as the Valley's top fighters pit their courage against their rivals' speed and strength. But one last surprise changes everything.

Fierce rivalries. Fresh opportunities. Daniel and Johnny find themselves back where it all began — and the stakes have never been higher.