But they never meet each other. One day, they receive letters respectively from a mysterious guy who knows what they did before. He forces them to do two assignments.

• 一日,两人分别收到一封神秘信,信中表示对两人收山前干的勾当一清二楚,并迫使两人完成两项任务,否则便揭穿他们的底细。