He is Michael, the angel favored by God, and the angel who takes humans to the other side after death. She is Lan Ruoning, a simple and happy person. They would not have crossed paths at first, but because of an "accident", God brought Michael to Lan Ruoning... (All because of God's playfulness, God felt that hundreds of millions of years had been too dull, and wanted to play elsewhere, but the angels refused, so he found Cupid and asked all the angels to shoot arrows of love)