It is London, 1892 and Defendant 47 is on trial however cannot keep in mind who he's. He solely can keep in mind just a few particulars, the place he is been recently and glimpses of the previous. Defendant 47 slowly begins remembering that he is mathematician who runs a pictures studio. He now remembers that his most well-liked topic had been kids. By way of them, he met Ellen Rhodes, the one who will solely convey him to a darkish finish.