Stellar Homeward: Hearts of Steel

Kai, a young scrap mechanic living in a run-down junkyard, stumbles on a mysterious glowing alien core hidden amid metal wreckage. He cobbles a battered mech from discarded waste and enters brutal underground mech tournaments, mocked for his "trash-grade" armor yet defeating every rival with unmatched speed and self-repair power. He crosses paths with Scarlett, an undefeated elite pilot piloting Aurora, a flawless top-tier military mech. The two clash fiercely in the championship before unexpected alien threats emerge from deep space. Drawn into interstellar battles, they set aside rivalry to uncover the core’s hidden origins and stand guard over Earth, turning abandoned scrap into a force that defies all odds.