High School Dilemma

David, a very brilliant lad losses his dad and all of a sudden, his mom remarries a very unpredictable but violent character, his mom seems blinded by 'love?'
His new dad beats up his mom at the slightest provocation and yet his mom still doesn't want to leave him, this really affects his studies; an A students turns to a D student overnight, but his classmates always look out for him, especially the new girl; he has the hots for her.
What will eventually be the outcome of his family and studies?