The people that survived the 1993 incident lives sheltered in the Citadel and can hardly leave because of climate change. You play as Joel, a civil servant who has a quiet life until one day he discovers that Grace, his childhood friend, has disappeared. Her craft has reached the Citadel unmanned. It's at this point that Joel decides to leave everything behind to find her. Pilot Grace's craft and travel around desolate wastelands while you discover the story behind her mysterious disappearance.