Lord of the flies 1990

What happens when a girl named Ryder Walter gets into a fight with her twin brother. Yea well that pissed her off a lot so just to prove that girls are the same as boys she decides to disguise as a boy and go to her brothers school. But now she's got bigger problems they were in a plane crash and she is now stuck on a island with 18 boys ranging from 6 to 13. How will she survive without anyone finding out and will there be some love in the mess too. Lets find out