Cao Yan is a little gangster who lives on the streets. He has a bad temper and a cruel heart. He relies on his madness to make a living in the gray area. After he was severely beaten and seriously injured, a voice suddenly exploded in his mind - the voice came from himself, but there was more than one himself.
From that day on, one hundred thousand personalities lived in his mind, each of them was "Cao Yan", but they were not the same Cao Yan. Decisive in killing, proficient in hacking, playing tricks, venomous, and charming - as long as he "summons", he can replace him in an instant and inherit the opponent's abilities and memories. The price is that every switch is accompanied by the tearing of consciousness and the struggle on the edge of losing control.
Before he could figure out the ins and outs of this "million-self" system, his ex-girlfriend Su Nianxue, who had dumped him back then, suddenly returned from overseas, wearing a high-rise dress and smiling calmly and unfathomably. She returned to Cao Yan's life with a "dream invasion" incident that swept the city. Everyone who fell into the dream no longer looked like themselves, their personality was replaced, and their will was tampered with. And the source of this catastrophe actually pointed directly at the first crack in Cao Yan's brain system——
The darkest "self" in him was missing.
Cao Yan must retrieve the lost dark personality, find out the truth behind the system, and at the same time face the plans of his ex-girlfriend after she returns. And among the ninety-nine thousand nine hundred and ninety-nine "I's" left in his mind, some people have begun to make plans, trying to turn against the guest and take away the true sovereignty of this body.
When his wild and unruly personality collides with his ever-changing personality, what Cao Yan has to do is to make these 100,000 of himself listen to him.