The true plot of Castlevania: Grandpa Vlad Belmont went crazy and started biting people. His family decided to put him in an insane asylum (castle) but every couple years he escapes.
"Grandpa, please stop throwing fireballs at me."
"Grandpa, don’t make me use the whip."
"Grandpa, don’t transform into a bat-beast or I’ll have to use HYDRO STORM"