A fatal likeness

Late at night, a lonely figure walks the streets of late Victorian London. No Jack the Ripper, he, but a young writer, looking for inspiration on his nocturnal walks. His head full of the beautiful heroine of his novel, he suddenly sees his fictional ideal in the flesh. She is under a gas lamp, kissing an elegant gentleman. A few days later, he is introduced to this creation of his mind and falls in love. Will his love affair procede the same way he writes in his novel?