“I can see the color of your pain. Your boyfriend is black, your parents are gray. But what breaks my heart most is that you've turned yourself gray-black, too.” Su Wan runs a unique emotional healing practice. She can enter other people's dreams and awaken the selves they've repressed. She heals a young woman manipulated by her partner, rescues a newcomer being exploited at work, and brings warmth to a boy who is bullied. But as she heals others, she discovers that she herself is the perfect awakened candidate on the “sacrifice list” of a dark healer. Then Lu Jinghong, the mysterious man who always appears late at night, takes her hand. “Don't be afraid. I'll protect your light.” He bears the secret of his family being turned into emotional puppets, and every time he purifies dark energy, he pays by losing some of his own emotions. She carries the childhood wound of being neglected, and absorbing negative emotions drains her, too. Those who heal everyone else need healing themselves; those who illuminate the abyss will eventually be seen by it. When their faint lights intertwine, they must not only fight the dark forces that devour emotions, but also uncover the ancient truth that emotional energy sustains the world's stability. And far away, an emotional storm sweeping across the nation is quietly gathering.