"Headhunted to Another World: From Salaryman to Big Four!" centers on Hiroto Amamiya, a dedicated but overworked salaryman who is unexpectedly transported to a fantasy world after collapsing from exhaustion. In this new realm, Hiroto discovers that he has been summoned as one of the "Big Four," a group of powerful individuals tasked with maintaining balance and order across the land. Each member of the Big Four possesses unique abilities tied to elemental forces, and Hiroto is granted control over the element of earth, granting him immense strength and defensive capabilities.

The narrative explores Hiroto's adjustment to his new role, as he navigates the complexities of leadership, diplomacy, and combat in a world filled with magic, mythical creatures, and political intrigue. Alongside the other members of the Big Four—Lina, a fiery and impulsive mage with mastery over fire; Kaito, a calm and strategic swordsman aligned with water; and Yuna, a mysterious and agile archer connected to wind—Hiroto must confront threats to the kingdom, including rogue factions, ancient monsters, and rival nations seeking to exploit the world's fragile equilibrium.

As the story progresses, Hiroto's corporate background becomes a key asset, allowing him to approach problems with strategic thinking and organizational skills uncommon in this medieval-like setting. His journey is marked by personal growth, as he learns to balance his newfound responsibilities with his own moral compass, often questioning the ethics of his actions and the consequences of wielding such power. The series delves into themes of teamwork, sacrifice, and the clash between modern sensibilities and traditional values, all while maintaining a focus on action-packed battles and world-building. The dynamic between the Big Four evolves as they face escalating challenges, testing their unity and resolve in the face of an impending catastrophe that threatens to unravel the world itself.