Jeff Bowen and his twin, prodigies recruited by the shadowy organization Egrigori after enduring lifelong ostracization for their unparalleled intellect, channel their talents into designing advanced weaponry. Assigned to apprehend ARMS-bearing targets, Jeff commands the combat cyborg Plus—a tool the twins eventually repurpose to orchestrate a harrowing attack on Aisora’s school district, defying Egrigori’s directives. Their betrayal sparks a fierce retaliation from the organization, pitting the siblings against their former benefactors. This clash unfolds as protagonists unravel the mysteries of ARMS, clashing with Egrigori’s operatives across the United States. Jeff strategically deploys his arsenal of engineered innovations to outmaneuver opposition, though his ambitions beyond this tactical role remain undefined in documented accounts.