A kid inherits a mecha and a war he didn't choose, then spends 54 episodes learning that winning the rebellion means nothing if he loses everyone fighting it. Daba collects allies like the show collects planetary conflicts, each one adding weight to decisions that were supposed to be simple. The L-Gaim is beautiful and brutal in equal measure, but it's the people around it that make you stay.
In the year 3990, the immortal Oldna Poseidal rules Pentagona, a war-torn system of five planets. Daba Myroad, a survivor of the Yaman Clan, lives on the remote planet Koam with his friend Mirao Kyao. His father left him the L-Gaim, a white humanoid mecha called a Heavy Metal and the last relic of his people. While on the run from thieves who want the machine, the pair team up with Fanneria Amu, a would-be actress, and Lilith Fau, the last fairy in Pentagona. Daba vows to honor a dying thief's final request, and that promise sends him toward the powerful merchant Amandara Kamandara. Along the way the group gathers more allies, meets strong enemies and is drawn into a rebellion against Poseidal. The series is a 54-episode mecha adventure and science fiction drama.