Sun Ya had just given birth. Awakening from sleep, the child unexpectedly vanished without a trace. Surveillance evidence pointed directly to her selling her own child. Facing the relentless questioning of her husband and mother-in-law, she was unable to clear her name. Amidst the pressure from everyone, during a dispute she accidentally fell from the rooftop to her death. Reborn in a single morning, she returned to before the tragedy occurred, prepared in advance to establish an alibi, desperately protected her child, calmly laid out plans to unmask the mastermind behind the scenes, peeled back the layers of conspiracy and fog, and finally uncovered all the truth, safely rescuing her own child.