I agree with your theory. Although I don't think it looks like trash.
Here's what I'm guessing: Colin Ferrell is married to Nicole Kidman and they have two children. Colin Ferrell is a surgeon and he operated on the kid from Lost's (IDK his name, LOL) dad and killed him. He may have been paralyzed and then died, or he may have just died. What's interesting is the part where Colin says that only an anesthesiologist can kill a patient, a surgeon can't. Which isn't actually true. But I'll be interested to see what the actual cause of death was. As revenge, the Lost kid does something to the surgeon's children which causes them to be paralyzed as well. And he might plan on doing the same thing to the wife, because at one point the daughter says something like, "It'll happen to you, but you'll get used to it."
It looks promising. I kind of wish it was a book. But I love the cast. They're all very talented actors, so I will definitely give this one a try.
I'll see it too but I have no expectations.
Why do you call him the kid from LOST? I don't remember him from that..
He was in Dunkirk. He's a bit different looking..