Kira wakes up in an unfamiliar and luxurious apartment after a night of heavy drinking with her friend Jackie. She discovers through Jackie that her ex-boyfriend had shown up, causing a scene, and had been arrested after threatening them. Due to safety concerns, Jackie insists Kira stay with her and her twin brother, Jake, and girlfriend Martha until things settle down. As Kira tries to process everything, a sudden strange phenomenon occurs. A mysterious AI named Steve announces that the world has been seeded with mana to combat a looming virus. Humans have been upgraded with abilities, status screens, and the ability to sense mana. Dungeons start to appear, and the world undergoes a drastic transformation. Now, Kira and her friends must navigate this new reality, fighting monsters, leveling up, and uncovering the truth behind the virus threat.