Centuries ago, Sapiens escaped the terrors of the Udo, a race that once held them hostage. Now, the Sapiens live in harmony with more comforting memories, relaying them at will with perfect recall with their miracle device, the Keige. In this city every Sapien calls home, the Great Murmur oversees all. Wren Corvallis lives a life with comfort and frivolity at the fingertips. When a sole Udo from this long thought dead species named Pip has arrived secretly, Wren has a difficult choice to make. Pip comes with no ill intention, only asking Wren to return with him, for the Udo are staring down possible extinction, the only solution lying with the famed Lenten Rose, a mysterious flower known to both races. Wren must choose to stay with his people or trek across the deadlands to aid a people he has been taught to hate.