On this "sea of oblivion" that devours memories, the memory submariner Ahe is the only ferryman. He drove a lonely boat through the thick fog, salvaging the broken time and space known as the "Island of Memory", just to find his sister Leanne who disappeared five years ago. Each memory fragment is both a clue and a trap, luring him deep into a huge vortex of lies and truth. As he gradually approached the core, he discovered that his sister's disappearance was no accident, and that he himself was the key to this forgotten storm.
