From some dude on Reddit :
cant really summarize the whole movie but it ends like this
Kenneth Braugnah's character is sending objects back in time to cause chaos and tragedy. In the climax of the movie he plans to send a reactor to the site of the Chernobyl disaster and the characters have to go back to when he was born in order to stop this from occurring. He follows them into the time before his birth and it is revealed the Keneth Braughnah essentially creates himself leaving him in a sort of paradox.