In a world filled with conflicts between humans and non-humans, the nine continents inhabited by humans are separated from a distant land known as "Far Far Far Land," home to non-humans with supernatural abilities. Humans fear these beings and consider them a threat, leading to their rejection. Amidst this tension lies the Hidden Kingdom, a mysterious land that has not been officially recognized by humans. The kingdom consists of three parts: the cursed Doradas Forest, the gloomy lower city controlled by gangs, and the prosperous upper city ruled by a tyrannical royal family. In the upper city, lies the Aristo Orphanage, a place that gathers unwanted children or those possessing non-human abilities. These children are sent into the dangerous Doradas Forest to uncover its mysterious secrets. Each child bears a tattoo on their neck, granting them magical power that prevents them from escaping and returns them to the orphanage if they attempt to flee. One of these children is "Alp," a mysterious boy who possesses great physical strength despite his young age. He has a dark past and a specific goal he strives to achieve. Alp does not trust anyone and keeps his secrets, even from himself at times, perhaps due to the painful past that has not yet been fully revealed. Throughout his journey in the forest and with his fellow children, Alp faces many challenges related to survival and self-discovery while trying to understand his true role in this harsh world.