The Castaway's Unbeatable System

Underling Finn Carter is stranded on a desert island after a tsunami. CEO Celeste Sterling faces geomagnetic disturbance and satellite failure. As a veteran soldier with an Omniscient System, Finn gains overpowered abilities: he secures water, hunts, builds shelter. The CEO asks to join his group. When external enemies attack and natural disasters erupt, he takes down foes. They fight their way off the island. He is the hidden powerhouse!