Lin Xiaoman and Jiang Yi, two students who had nothing in common, came together because of a strange "echo" phenomenon. They could hear each other's pain, both physical and spiritual. This resonance made the two people gradually realize that they might have suffered for others in their previous life, and they were destined to resonate with the pain of others in this life. It turns out that this echo phenomenon is not accidental, but related to the cause and effect of their previous lives. They must face their past and untie the knots that bind their souls to truly escape the pain of this resonance.
Purpose: redemption