Summer of hell

Sam and Noah are what you call enemies. They hate each other with burning passion. They always are fighting at home and at school. Their parents are tired of it, their sisters are tired of it, and their teachers. Their parents come up with this plan that they go to California for the summer to try to get along. But because their parents have work and can't take it off till July 1st their sisters Grace and Mackenzie have to go with them since they are considered adults. In the middle of the trip what happens if something bad happens? Will that make them closer in some way? Will they both be there for each other or hate each other more? Will Noah's depression survive this trip? Will Sam stop being his normal self?