It dawns upon him in a frightening thought that in one fraction of a moment, he could fall in the kind of love so devastatingly beautiful that it will take him a lifetime to get over. 

When Chanyeol's grandmother passes away, she leaves him with nothing but a cryptic message—that his life will be in danger if he does not find the boy with purple eyes. With his grandmother's last words and his prophesied fate, he embarks on a journey to a faraway land to find the mysterious boy.