Marc is what happens when you survive the apocalypse but the apocalypse survives in you. The show doesn't flinch from what that costs, it shows you a man breaking apart piece by piece, made worse by the fact that you understand why he's breaking. Bai Yuekui knows his origin story before he does, which means she's been watching him destroy himself, and that quiet knowledge between them is heavier than any action sequence the show could throw at you.

Marc, once a commander of the Wilderness Hunters, has become a blood-soaked monster who tears down lighthouses. Led by the mysterious Bai Yuekui, he sets out on a new mission. When survivors living on the ground appear, it becomes clear that the lighthouse is not the last shelter left to humanity. Facing hardship, they draw on their own natural abilities to fight back against the Mana ecosystem. Bai Yuekui's history turns out to be tied to Marc's origins and to the truth behind the apocalypse. Meanwhile, the enormous brain on the lighthouse wakes up, old threats remain, and a fresh crisis arises. With disasters of a new scale approaching, the future of the two human factions hangs in the balance in this action-driven sci-fi continuation.