In the doomsday wasteland, cleaner Su Yao's only mission is to destroy out-of-control biochemically modified humans. In her last mission, she was penetrated through the chest by the monster numbered A-001. Before she died, she triggered the inter-dimensional jumper on her wrist - she traveled back to three years ago, on the eve of the doomsday.
After rebirth, Su Yao vowed to kill the man who had not yet turned into a monster: geneticist Chen Du. But three times she came close, three times her heart moved, and three times she couldn't make a move. The third time, she chose to save him, but she was infected by the virus. In order to save her, Chen Du volunteered to become an experimental subject, step by step becoming A-001 - the monster that once killed her.
Destiny is an endless loop: no matter how many times she travels through time, she will fall in love with him, and he will turn into a monster for her.
During her fourth time traveling, Su Yao finally discovered that the jumper was personally built for her by "Future Chen Du". He already knew the outcome, but still chose to let her go back and kill him.
——Are you willing to trade eternal reincarnation for him to be a human being again?
