Single mother Lin Wan unexpectedly gains the ability of same-day time reset and misfortune transfer. To protect her ailing young son and fight against malice and exploitation in life, she uses her ability to punish evildoers around her, believing she has guarded the boundary of good and evil. However, obsession quietly erodes her bottom line, and the backlash of her ability gradually affects the innocent. As one game ends and victory and defeat reverse, a mysterious pendant uncovers the deep secrets behind the ability.