Children of the Sea, Volume 4

Jim, Dehdeh, and Ruka's mom finally track down Anglade's yacht, but neither the rogue scientist nor Umi and Ruka are on board. All that remains is a cryptic invitation to Jim. While Jim tries to figure out the game his ex-colleague is playing and Kanako dives into memories of her daughter Ruka, the strange sea-changes continue around the world.