Trapped inside his house with a malevolent ghost, a father must protect his family, whilst the ghost, who turns out to be an old foe, sets out to play each family member off each other.

I like the idea I think that making it more ironic will help

I like the idea

"Trapped inside his house by the malevolent ghost of a rival, an (Adjective) father must save his family from the deceptive spirits evil plot to turn each family member against each other."