The story of ISLAND is set on Urashima, an island that has been cut off from the main land by the actions of its three ruling families and by a mysterious contagion.
With the help of the daughters of the three ruling families, Setsuna seeks to unravel the mysteries of Urashima.
Setsuna has no memories except for his own name and his mission: he’s been sent from the future to save Urashima.