Nathaniel's life was going well. He had a family that cared for him, and a job that fulfilled him. He didn't' think anything would go wrong, until one day, he finds himself transported to another world. Nathaniel alongside four others were summoned as heroes to protect the continent of Everhall under the banner of the Gilbrant Kingdom. Each of the heroes were bestowed with legendary ranked talents, and heroic classes to aid them in their fight. Unfortunately, no one sees Nathaniel's class as heroic.

Nathaniel was bestowed with the never-before-seen Inventor class, an intelligence-based crafter class. To make matters worse his talents are Innovation, a talent that make inventing new items easier, and Intuition, a talent that bestows knowledge. With a crafter class and non-combat talents, the nobles of Gilbrant don't see Nathaniel as a legendary hero. All except for Ophelia, the kingdom's oracle.

Trials and tribulations await Nathaniel as he navigates life in this new world, and he must find a way to utilize his class and talents to prove himself worthy, but time is not on his side. The monstrous Horde, a loose alliance of monsters from Pa'palla, are invading from the west and have taken the land bridge. Not to mention, the demons of Zechriel have stationed their flying castles on Everhall's northern shores to better prepare for further expansion. Nathaniel must set aside his doubts and fears, and embrace his burdens to become the Inventor Hero.