There is a tattoo on Su Li's palm - "It's a butterfly".
This is the only thing he brought with him after traveling through time. He didn't know where the butterflies came from, but he only knew that every time he thought about this tattoo, his heart would hurt.
Until the abyss comes. A program called "Abyss" invades the world and pulls randomly selected humans into deadly copies. Su Li has awakened the "Crisis Alert" skill, which allows him to predict the scene before danger approaches. Relying on this ability, he survived the novice copy with extremely high mortality rate.
At the critical moment of the dungeon, he met 'Yun Zhounian'. Silver-gray hair, a cynical smile, and a master's degree of skill in the copy. His familiarity with the copy mechanism is far beyond common sense, and he can always react before danger arrives.
As the difficulty of the dungeon escalates, the truth of the abyss gradually emerges.
Intention: Love is not a mistake, nor is persistence.