Lin Hai, legendary mercenary known across the elite circles as the battlefield reaper and crusher of empires, finds himself bound by an unexpected engagement to a stunning CEO. By day, he serves as a lowly security guard dismissed by his fiancée at her company; by night, he emerges as her mysterious personal protector, the enigmatic figure who materializes whenever danger strikes to dismantle every threat with lethal precision. The formidable soldier king reclaims his dominance over the sprawling metropolis.