Can anyone please help me with this? Some years ago when quite young, I saw a film which disturbed me and I know need to see this film again but I can't remember the title. I think it started with a shot of a family of kids at a birthday or Christmas party and all had been murdered. The plot involved a man who subsequently turned out to have murdered them but who had lost has memory and developed a new identity and life. In the end he preyed upon his new family. I think he was some kind of stalker and his new wife found his mask. Sorry this is a bit muddled! Thanks very much.