Brian finds his mom cheating on his dad, which basically is the whole reason everything happens in the story.
brian gets on the plane and learns how to fligh it. then seconds later something terrible happenes.
the pilot dies of a heart attack and brian is left alone. he has no choice but to fly the plane himself.
the plane after two hours of Brian flying it runs out of fuel and the plane runs out of fuel. the plane lands in the lake.
brian finds the gut berries which give him a food source but later makes him sick.but that because he did not take out the the seeds in the middle. at this point he has found a sustainable recource.
brian goes to get more gut cherries and encounters a huge scary black bear. the black bear stays calm and leaves brian alone and lets brian know that if he leaves the animals alone they will leave HIM alone.