The rain started when Reia was six, and it hasn't stopped since.  The land of Hai, like many others, has been swallowed by the tumultuous blight of Rain Season that raves through the world every year for months on end. Towns swallowed and cities suffering the acidic aftermath left in its wake, Hai's beloved King Buo Chen has no other option but to marry off his eldest, beloved daughter, Reia, in exchange for gold at the mercy of his rich neighbour, Sol City, the land of sunlight, the only part of the earth left untouched by Rain.  But upheaving her life to move to Sol City to go to bed with a stranger that she will have to call her husband is not an easy feat, and so Reia faces numerous obstacles and soiled truths as she makes her journey to her new home. Faced with her obligations and the complications that comes with being the new bride, Reia discovers the traumatizing secrets hidden within the Sol's castle walls, ones that that could wipe out the entire human nation if not stopped in time.