Dan Howell is dead. Well, sort of. He's a guardian angel, forced to protect only one human, and that human is Cat. But when he accompanies Cat to school, he can't help but be intrigued by the broken boy with the black hair who sits by the window in class and disappears at lunch times. Dan realises this boy needs more protection than Cat will ever need, so he takes on human form to save him. But soon he finds himself falling in love, which is something he definitely can't do. Dan Howell is an angel, and he's falling for Phil.