On a world enshrouded in darkness, Painter patrols the streets of Kilahito, using his art to trap and disable nightmares that emerge from the shroud. On a distant sunlit world, Yumi is a yoki-hijo - a priestess who summons spirits by stacking stones in intricate patterns, serving her community through a life of rigid ritual. When the two are suddenly flung together, swapping bodies across worlds they didn't know were connected, they must learn each other's crafts and unravel a mystery that threatens both their peoples. Narrated by Hoid and inspired by the manga Hikaru no Go and the anime Your Name, this is Sanderson's most character-driven Cosmere novel - a slow-burn story about connection, identity, and the value of art, set against a backdrop with deep implications for the wider universe.