Looking for a suspense/thriller movie about a couple who wake up with amnesia and need to figure what happened. He is the killer, she's his victim.
I am looking for a movie but my memory of it is a little hazy so some details might be not as accurate.
Live action, Suspense/ thriller?, English language, I think American. Most likely after 2010 onwards.
2 people, a man and a woman, wake up together like in a field connected together like with handcuff or maybe they just got up together. They don't remember anything.
If they split up, things around them die but if they are together, it's ok. (I think, I think that's how they see the things die; the grass around them starts dying when they split up).
They try to figure out what happened to them, eventually they find out that the man is a killer and she is his victim and eventually he gets killed at the end and she escapes.
It's not After 2012 (there weren't monsters, he was a killer and she was his victim, it wasn't a love story. The might be even blonde, at least one of them?)
Edit, solved: Radius 2017