This is a planet full of blue buds, called Oya. Sunlight is the entire life input of all people on this planet. Every day, Oya people raise their palms to absorb the energy of the sun, and provide all the energy they absorb to the flower buds to maintain their life. Laura and Lyla are the most ordinary residents on the planet. In order to pursue freedom, Laura took Lyla to the sunless canyon to ask for help from the predecessors, but this trip changed each other's destiny.