Ji Yan is a young man who has never had a finger in the sun. He has been in poor health since he was a child, but his parents love him and his life is going smoothly. However, when he saw a stray cat when he went out, he felt pity for it and was about to take it home. As a result, he was hit by a car unexpectedly and became a vegetable. While in coma, a system claiming to be Zero Zero One came to him, saying that if he signed a contract with it to travel through time and space and complete the mission, he would be reborn.
