Seth is the angel's name. When Maggie (the lady doctor) asked him what was his last name, he didn't know what to say, so he lied and said: Plate.
......
After Maggie fell in love with him and realized that he was a real angel, she escaped from him.
When they finally meet at Lake Tahoe, they sat at the lakeside and Maggie said: we are Mr. & Mrs. Plate.
Nothing is more romantic than that moment.
