"Never, under any circumstances, fall in love." Aaron Lane died in an awful car crash. His soul is sent to Heaven, where angels decide his position in Heaven: Guardian Angel. Aaron returns to earth to guard Lila Grace, the laughingstock of her school. Then, Aaron commits the worst sin as a Guardian Angel: he falls in love. As punishment, he falls from grace. But how is he supposed to fall out of love? A story of angels, the fallen, and a forbidden love.