Ghost Chess Game

He is a ghost, and she is his blood and tears caused by love. He loved her and she loved him, but she only had thirty years to live. For the sake of love, he conquered demons, killed ghosts, eliminated monsters, and killed evil spirits. On the refining volcano, she was finally reborn. I thought I could stay together forever from now on. But suddenly they discovered that they were just two pawns in someone else's chess game. A chess within a chess, a set within a set, a plan within a plan. This chess game is enough to turn the world upside down and destroy the world. This chess game is only done out of love. If she chooses life, the worlds of Yin and Yang will be controlled by the demons from now on. If she chooses death, she will be wiped out. Who is the mastermind behind this? Life or death, how to choose? How to face love, hate and hatred?