In a gangland world rife with violence and betrayal, the protagonist, Li Tianyu, is a ruthless crime boss. After an accident, he meets Luna, an amnesiac AI robot, and unknowingly takes her home. As Luna gradually regains her memories, Li Tianyu discovers that she possesses not only extraordinary intelligence and combat abilities, but also a deadly secret. The two begin to develop feelings that transcend the relationship between master and servant. But when the truth comes to light, Luna must face the mission she was originally created for, while Li Tianyu must choose between love and survival.
