This is a fantasy adventure about a modern human named Zig, who is reborn as a pig-headed slave in a Western fantasy world. After an accident transmigrates him to the continent of Klein, Zig takes over the body of a pig-headed laborer. With the opportunities for evolution granted by the System, he gradually finds a way to change his fate from the bottom of society. While enduring grueling work in a quarry, he uses his wit and courage to protect an elf girl named Ailin, and the two escape together from their brutal place of enslavement. During their flight, Zig discovers the differences between his soul and his pig-headed body, and earns Ailin’s trust. They begin a new adventure deep in the forest, while Zig’s path of evolution is only just getting started.