Yu Yongqiang, an ordinary courier, was born with blocked meridians and was regarded as a loser without the qualifications to practice. While delivering a courier, he was involved in a conflict between people with superpowers and accidentally obtained a wordless heavenly book. The Book of Heaven allows him to see the "line of cause and effect" of all things in the world, and temporarily "graft" other people's abilities for his own use. With this power, he kept a low profile and lurked step by step in the urban undercurrent. He grew from an oppressed low-level person to the mastermind behind the storm. He has clear grievances and decisive killings. Faced with the provocation of underground forces and the conspiracy of superpowers, he uses wisdom to plan and fights back with the power of cause and effect. However, behind the secret of the Book of Heaven, there is actually a huge conspiracy spanning a thousand years...
