He is sentenced to death for his crimes but is given a chance for a pardon. To earn his freedom, Gabimaru is sent on a mission to the mysterious island of “Tsurumi-no-Kuni,” also known as the “Island of Perpetual Youth,” where he must find the elixir of immortality.
The story follows Gabimaru and a diverse group of criminals, each with their own unique abilities and backgrounds, as they navigate the dangerous and supernatural challenges of the island.