Describe the plot of Charlie and the chocolate factory novel?

A handful of children win a contest that grants them a tour of the local chocolate factory. During the tour, all but one child misbehave. The chocolatier chooses the one remaining child to take his place as the new chocolatier.

Charlie Bucket lives on the outskirts of town with his poverty-stricken family: his parents and all four grandparents. Each day on his way to school, Charlie passes the best and biggest chocolate factory in the world, run by the secretive Willy Wonka. When Charlie's father loses his job, things go from bad to worse.