After losing her only friend to suicide, Ai Ooto is thrust into a surreal journey when she acquires a Wonder Egg following mysterious guidance. Breaking the egg in a dream world, she must confront and save individuals facing hardships, hoping to find solace for her departed friend. As Ai delves into this perilous mission, she uncovers the interconnectedness between her own struggles and those haunting others. Amidst a landscape where past wounds and deep fears manifest, she navigates Wonder Egg Priority, unravelling the diverse inner battles plaguing humanity to offer salvation from their darkest nightmares.