Yeon-woo sees the globe only in grey light by a neurological loss of sight. When he meets Yoo-han, it's like a meeting of fate: Yeon-woo experiences a shade rush, a sensations that makes him suddenly see colours through intense experiences. Next to these weird experience and also the concern whether Yeon-woo as well as Yoo-han are predestined lovers, there is additionally the secret of a mother's loss to unfold.