This is all about Billy Madison (Adam Sandler) who is a dead beat that sponges off his rich father. When his father anounces that he is to retire and leave his hotel chain in the hands of Eric (the bad guy of the movie) Billy proposes a challenge...he has to do all the grades of school over again... 2 weeks each grade. A lot of toilet humour in this one but it is hilarious if you like that sort of thing.