Marvelous Martin Mitchell is a ten-year-old neighborhood private investigator. If something is lost or stolen, if a bully is taking advantage of someone, Marvelous Martin is on the case. He is good at solving mysteries, including everything from stolen lunches to missing pets. He usually gets paid for his detective work, too. No one likes a bully, and Martin and his friends are no different. When mean Mark Beeks, the school bully, steals little Freddie Freeman's bike, it is the last straw. Martin and his crew decide to put an end to Mark's bullying days once and for all in this first installment of the Marvelous Martin series.