They from Yuhu Lake

In Yuhu, a city with legends of mysterious murders, police officer Lin Ruoqin, who had a rough life but had a cold and ruthless personality, traveled back to the body of Lin Xiaoyuan, the first woman who died in Yuhu. Will Lin Xiaoyuan's liveliness and cheerfulness melt the cold Lin Ruoqin? Can Lin Ruoqin unravel the meaning of her mother's last words?