Sulitha, nickname Sui, is your average teenager. Attending school, or meeting up with friends; everything was going fine—until a mysterious guy, K-E-I-N disturbs the normal flow of her life. After trying desperately to find out who he is and having the chance to see him again, Sui starts to unravel a mystery—her lead being a single feather that Kein dropped in the forest a year before. Stumbling upon a strange little gift shop in a big town, she finds a strange book. Within its pages is the half-truths of the urban legends of the Nixia. As her birthday fast approaches, strange things start to happen in her life which she cannot control. What is her connection to the Winged people? Will her life ever be normal if she finds out who they are? And will she and K-E-I-N ever meet?