Upon hearing of Ushio’s death, Shinpei returns to his hometown of Wakayama City on Hitogashima and reunites with his childhood friend’s family. The funeral goes smoothly, but under the surface something strange is brewing on the island. What mysteries await him on this secluded summer island?

Gudetama, the lazy egg, reluctantly embarks on an adventure of a lifetime with Shakipiyo, a newly hatched chick, who is determined to find their mother.