She Stole My Heart- the unofficial and likely to be changed title

Yesterday I started writing a book and I'm really excited.  I hope I will actually finish it.  I have never finished writing a book. I just run out of things to say, and only write like a page before I give up.

The book is about a man named Sebastian Enhart, who is 217 and wants to die.  His wife stole his heart when he was 27 and didn't want him to die.  She was selfish and never wanted to live a day without him.  So now that she is dead Sebastian doesn't know if he will ever die. He is trying to find a way to bring her soul back so she can give him permission to die. 

 I really like the plot line.  I got it from a friend of mine who after we play Ultimate Frisbee he always says he feels like dying, and I always tell him that he can't because I didn't give him permission.  Eventually after about the second week of doing this he said, "hey, that would be a good plot for a TV show."  So I figured I might as well right a book about it.  I really hope I can finish it.  I'm not a very good writer but I'm better than I used to be. Like once I wrote like a paragraph for a book and then didn't finish because I didn't know where to go with it. I thought I wrote it really poorly, but then looking back on it, if it were a real book I might read it. 

Question:  What would you like to write a book about?