Polindromen Island. Twenty-eight hours until the counter starts. Tempesta was born in a world that was flooded five hundred years ago. Now the ruins of the cities rest under water, and the inhabitants of Polindromen regularly explore them in the hope of receiving rewards. Tempesta dives every day in order to one day, for exactly one day, revive her sister Elisia. The girl died and took with her a terrible secret about the fateful day when their parents died. Tempesta knows that Elysia was responsible for their deaths. The counter has started. There are 24 hours left. But Elysia has other plans. She doesn't want to spend her last day in captivity. Together with his sister, they go on a dangerous journey to find out the truth about the death of their parents. But Polindromen's caretakers are desperate to find them before Elysia's time runs out and the girl learns the true cost of her resurrection.