What is the story of Frankenstein about?

Frankenstein turns to forbidden sciences and discovers how to recreate life. When he does, however, he believes that he has created a monster and flees. The monster chases him and demands that he creates a "mate" for him. Frankenstein almost does, but winds up refusing. The monster kills everyone close to him. He turns to pursue the monster. He dies. A sailor finds his written works and tries to continue the quest. the book ends.