Xin Liuyue was misled and indirectly killed the person she cherished most. She got her revenge and followed him. She traveled through time and space by mistake, but lost almost all her memory. She searched for the past step by step. Through the unforgettable entanglements along the way, could she control her own destiny? Is it a play on the impermanence of true love, or is it a play on real sadness?