Kael Renar, a 28-year-old software engineer from Earth, is isekai’d to Eryndor, a massive planet ten times larger than Earth, with 70% ocean and teeming with monsters and magical beasts. After surviving two weeks, Kael activates a mysterious System that allows him to summon players from Earth, dubbed the "Fourth Disaster," who treat Eryndor as a VRMMORPG. Kael, as the Game Guider, gains half the experience players earn (unknown to them) and uses their chaos to build a cosmic empire, exploring uncharted seas and, later, space, while uncovering the secrets of his isekai and Eryndor’s past.