A boy and a girl are compelled to hold hands for all eternity!? In a land devastated by an epidemic called "Troy," the only individuals possessing healing arts capable of halting the seizures induced by the disease are the Sisters. While they exhibit high resistance to the illness, they are seeking someone who is truly immune, should such a person exist, in order to discover a cure. The protagonist is Sister Elraine, one of the Sisters who contracts Troy. However, when she makes contact with Kiri, an apparently ordinary boy, her seizures cease. Could he be the one!?