Four years after retiring as Spirit Detective, Yusuke Urameshi is living quietly with Keiko, running a ramen shop. But when strange attacks by humans augmented with spirit energy shake the city, Spirit World begins to panic. Koenma, once confident Yusuke was no longer needed, appears in person to plead for his return. With Botan as his messenger and Keiko as his anchor, Yusuke must decide whether to honor his promise of peace—or step back into the fire. Meanwhile, Kuwabara is already battling the threat on his own, Genkai senses the storm coming, and familiar allies stir in the shadows.