Hao Zhu, the product manager of a major Internet company, died suddenly after working overtime for 72 consecutive hours. Because of his excellent sleep quality during his lifetime, he was specially recruited by the underworld as an official Yin Er. In this world, ghosts often suffer from insomnia due to deep obsessions, leading to depletion of soul power; but Hao Zhuo has a steady stream of soul power because he "can sleep and sleep well". More importantly, he brought the wisdom and empathy of a major product manager to the underworld and soared with his outstanding business capabilities.
When faced with a grandfather who was worried about his granddaughter and refused to let go, he soothed his anxious soul with a peaceful sleep; when he met a colleague who couldn't let go of work, he helped him write a weekly report; when faced with a group of 12 people who died unexpectedly during team building, he guided them to let go of their obsession with product launch and sleep peacefully; he also helped a girl who died in a foreign land find her boyfriend and finally return to her mother. Relying on his excellent sleep state and the "product thinking" to resolve his obsessions, he traveled through various departments such as seduction, trial, and reincarnation in the underworld. With this outstanding ability and compassion, Hao Zhuo rose through the ranks from the grassroots level, and was eventually elected as the Great Emperor of Fengdu. He used the simplest "good sleep" to heal countless wounds in the underworld, and also gave the entire underworld a long-lost peace and warmth under his management.