Revenge of the Son In Law

Dave is a poor boy whose father is no more. The only one he has left is his mother. Everything Dave does is for the survival of himself and most importantly, his mother.
Dave leaves his former job as a mechanic and goes to a big company to become an errand boy to Mr Adams, the owner of the company. Everything goes smoothly for Dave and his mother but...
What happens when Mr Adams makes a bet with his friend on Dave's mother? Read more to find out.