Movie stars male protagonist whose father was a actor in a monster movie where he played the main character that killed the monster and is in a town where the father lives i believe the son came to visit as it was the time for the regular celebration of the movie the father was in.However every cycle of years the monster from the movie comes to life the town is oblivious to this besides the father who has had to slay the monster every cycle however due to aging he is unable to keep doing so.It’s now up to the son to stop the monster (there was something about you can’t kill the monster the same way
and the way they killed it in the end was a explosion)