Lin Du, 26 years old, was a former operator of a large Internet company. He was laid off, broken up, and kicked out by his landlord. When he was desperate, he inherited a broken Taoist temple from his distant uncle, on the condition that he must serve as the abbot for 999 days. He originally thought it was a legacy of dawdling, but he found out that there was a talking weasel in the Taoist temple, an encrypted "Qingyun Alchemy", a solar-powered scanning merit box, and apprentices who came one after another. Inner elixirs, charms, incantations, takeaways, live broadcasts, community group buying... The daily life of a modern Taoist priest is much more exciting than going to work. However, his two most favored genius disciples, Sande and Sanzhen, eventually betrayed the master with Sanyi. 999 Days, from mortal to abbot, from obsession to letting go.