As an embalmer, Van En accidentally heard the whispers of the deceased while handling the corpse of a "heretic" hunted by the church, and awakened [the reverberation of the old gods].
He extracted the "Shadow Stitch" skill from the corpse, sutured his wounds, and discovered that the church's so-called "purification" was actually covering up the truth about the corpse's mutation.
In order to earn money to buy medicine (to maintain his sanity), Vann began to sell the "divine oil" extracted from corpses on the black market, which aroused the covetousness of the gangster "Iron Hand Gang".