Ten year old Nico White lives in a perfectly safe and well built town, but he is bored by its peaceful confines. The son of a famous adventurer, Nico has inherited a special crest on his hand known as a Mod Power, which allows him to craft any tool or item he can imagine without needing a crafting table. Driven by a desire to follow in his father's footsteps and prove his own strength, he dreams of leaving his home to travel to the very end of the world. His chance arrives when a zombie attack forces him to use his powers to defend his village, earning the right to begin his journey.

Almost immediately after setting out, Nico encounters a strange and intelligent zombie who speaks. This is Gray, a man cursed by a mod that transformed him and his entire village into undead monsters. Unlike other zombies, Gray does not burn in sunlight and has retained his intelligence. He joins Nico on his quest, hoping to find a cure for his condition. The party soon expands to include Yamabuki, a loud and unstealthy ninja who was kicked out of his village for his lack of hiding skills but is a formidable fighter. They are later joined by Navy, a small, talking creeper, and Platinum, an iron golem designed to look like a human woman, all of whom share the goal of reaching the world's end.

The overarching narrative follows Nico and his companions as they travel across diverse biomes, from deserts to oceans to volcanic mountains. Their journey is episodic, with each stop introducing a new village in crisis or a powerful foe to overcome. These arcs include defeating the Sand Gang, a group of thieves who steal an entire village's water supply, rescuing a young girl named Lily from a giant spider grown massive by a growth mod, and crossing a dangerous ocean infested with Drowned. Nico also deals with recurring rivals like the Brown Brothers and must survive traps laid by the Old Trapster. As they travel, the group faces threats from bandits seeking to steal Nico's powerful mod and encounters unique creatures with mod powers of their own, including a curve-ball shooting Ghast in the Nether and a blue-flamed Blaze.

The stakes escalate significantly when the party finally reaches the End and defeats the Ender Dragon. In the aftermath, Nico and his friends are scattered, and a new, greater crisis emerges. A powerful enemy known as the Destruction King Abyss appears, wielding the mysterious King's Mod. The goal of Abyss and his Evil King's Gang is nothing less than to change and destroy the world itself. Nico must reunite his scattered friends and face this ultimate threat to save the world he has learned is full of both wonders and dangers.