Ou Yu accepted the assassination mission for money, and the target was his sick and beautiful master, Li Yanshu, the former number one swordsman in Xuantian Sect. However, when Li Yanshu drank the world's strange poisons like "Seven Days Absolute", "Broken Heart Herb" like sugar water without changing his expression, and even commented that "the dosage is too low", Ou Yucai was shocked: his master had lived for a long time, and all the poisons in his body were balanced by themselves, and even the King of Hell was too lazy to contain them.
A murder of "the one below commits the crime above" has since strangely transformed into a ridiculous daily life where the master provides online guidance and the apprentice conscientiously "researches and develops" new poisons. It was not until his experience in southern Xinjiang five years later that Ou Yu caught a glimpse of the source of his master's emotional numbness - "love apart", and his heart was as gray as death. And he himself, in the process of being "poisoned" and "coached" day after day, developed a twisted and absolute possessiveness that he was not even aware of.
When the boundaries between murderous intent and redemption become blurred, where will this master-student relationship, which began with murder, go?
Purpose: To explore eternal loneliness and twisted bonds. When life is so long that it becomes numb, when emotions freeze themselves due to fear of "love separation", how can a ridiculous "murder" become an opportunity to awaken perception and redefine "living"? In extreme relationships, we get a glimpse of human nature's complex desire for "existence" and "possession".