In the twelfth year of the Apocalypse, the world was in chaos.
Fuso, a mysterious island country located off the coast, has coveted our apocalyptic land for a long time, so it controlled a group of teenagers called "Butterflies" with medicine and spiritual magic. This group of Fuso killers who grew up in an inhuman environment have become the Apocalypse Army's most difficult enemies.
Qu Yinglin, a young marshal who is famous all over the world, leads the Dragon and Tiger Division to fight against the Fusang Butterfly Army, but he mysteriously disappears.
Ruan Lin, the best pharmacist in the world, calculated step by step and gradually pushed the form in the direction he wanted.
The ignorant young Su Mang, from Fusang to Apocalypse and then to Fusang, only wants to protect his most beloved girl with a glazed sword. However, with the arrival of Apocalypse's victory, for him, the most painful secret in his life is about to come.