You accidentally meet him after work and see him burying someone, you panic and walk backwards and accidentally step on a branch so he can hear you. he chased you to the edge of a cliff, not knowing that the person he was trying to bury wasn't dead and hit him on the back of the head causing him to fall into the ravine and left him in a vegetative state for 2 years. when he wakes up, he has amnesia and wonders who he's and why he was locked up. you made up that you were his wife for survived.