On a stormy night, inside an abandoned factory at the harbor, a girl named Jiang He accidentally sends out a distress signal using an old wristband that flashes the sequence "one, three, two." As the lights flash one after another, the truth gradually emerges: children are being held captive, identities are being concealed, and secrets about the old factory remain unspoken. Facing fear and disbelief, Jiang He must learn to speak up. This time, will she wait for someone to rescue her, or will she make sure her own voice is heard first?