The mysterious distress notes that kept appearing on the desk were exactly the same as the handwriting of the senior who fell from the building three years ago, making Lin Xiaoman fall into endless confusion. Transfer student Jiang Ying holds a pocket watch engraved with the name of the deceased and presses on to reveal the secret of her late night exploration. The two were forced to form an alliance in pursuit of the truth, but in the process of cracking the rusty lock code, they discovered the mysterious past in the school history museum, a forged diagnosis of terminal illness, and an astonishing coincidence in appearance. Whenever the midnight bell rang, the sound of heavy objects being dragged was heard from deep in the teaching building, and white shadows flashed away in the rain. Birthmarks, bloodstains, incomplete files, what kind of appalling conspiracy is hidden behind the layers of fog? The two heroines work together to get rid of the cocoon, but they don't know that they have already become key pieces in the chess game...
Purpose: Pursuit of truth and persistence of justice