Wang Shiwen, who was on the verge of death in a car accident, was bound by a mysterious system: traveling through different worlds, completing tasks can change the regrets of life. Having been cowardly for most of her life, she embarked on a dangerous journey to make up for her regret for not being able to call her grandmother before she died. Each world is a mirror image of her character, struggling and growing. What awaits her at the end of the mission, is relief or deeper love and pain? What is the cost of changing the past?
