Here's Stanley, a middle-school boy. He was falsely accused of theft, and was sent to a prison camp in the middle of a desert. He's trying to help another kid, Zero, with getting through his life. When Zero runs away from the detention camp, Stanley stops at NOTHING to get Zero back, not even no water in a desert. When making his initial run, he tripped and got stuck in a dirt mound dug up by another camper.
ZERO! YOU NEED TO COME BACK!
Stanley will keep persevering through this crisis. He's running through the desolate desert to find Zero and convince him to come back to camp. Zero was found, by Stanley, under an old boat: "Mary Lou." Zero was living of an odd drink he calls Sploosh, which Stanley says "tastes like peaches".
I'll pull you up with the shovel.
Zero refuses to return to Camp Green Lake, and runs further into the desert. Stanley is determined to get him back, and will stop at nothing to get Zero back to camp. Stanley also feels bad that he drank the last of Zero's "Sploosh"
Zero ran up the mountain, away from camp. Stanley's dry throat isn't enough to stop him, however; he'll go (quite literally) the extra mile to get Zero to safety.
Both boys are out of water and are very dehydrated. Zero has agreed to help Stanley climb up the mountain to find water at the summit, where it is said that Stanley's grandfather did the same. Stanley still hasn't given up on getting everyone to a safe place.
Stanley's confidence paid off in the end, as he and zero reached the summit of the mountain, where drinkable water was found. If Stanley and Zero hadn't pushed through, they'd probably be buzzard food by now, according to the other campers.