Lin Wanwan, a female college student, works part-time in a supermarket and accidentally uncovers a past event from 15 years ago.
There is a box of mineral water on the ground floor, with twenty-four bottles on it. There was a row of wet finger prints on the side of the mineral water box.
Instead of five fingerprints, there were four.
Thumb missing.
Lin Wanwan's mind exploded with a bang. She squatted down and hung her fingers above the row of handprints, not daring to touch them. The water droplets have not completely dried yet, and there is a slight sheen under the light. The size of the palm was larger than hers, with thick knuckles, like a man's hand, but missing a thumb.
