When Mark met Rachel in a chat room, he fell instantly in love. She introduced him to her little brother. Those two hit it off and became friends. But then someone kidnapped Rachel and started to ask Mark to do some very dark things…
Sources:
https://listverse.com/2017/05/08/top-10-insane-events-in-historys-strangest-online-catfishing-case/
You Want Me 2 Kill Him? by Judy Bachrach, https://www.vanityfair.com/news/2005/02/bachrach200502
2005 Channel 4 Documentary Kill Me If You Can