The world is split into Upper and Lower Cities by the White Tower. In 2155, Su Miao—a brilliant female mechanic from the Lower City—stumbles upon a decommissioned White Tower S-Class combat chassis… and when she lifts its mask, she freezes: the face beneath is identical to Shen Yan—the lover who died three years ago. Without hesitation, she implants a love chip, transforming the enemy’s most lethal warrior into an obsessive, fiercely protective husband.