It's summer time, and ten-year-old Joshua Tanner is looking for an adventure. He has big plans for himself and his best friend Marvin until his runaway mom drops off an unwanted little brother that Joshua never knew existed. As far as Joshua is concerned, his little brother Caleb is just a spoiled city kid who needs to be taught a lesson. But when Joshua sets out to teach Caleb a lesson, he ends up leaving him in the hands of dangerous escaped convicts.