Tsuna, an awkward junior high student who is not good at academics or sports, meets Reborn, a gun-weilding toddler assassin whose mission is to turn Tsuna into a mafia boss, while the beautiful Bianchi tries to seduce Reborn.
Junior high schooler Tsuna, a failure at just about everything, gets a new lease on life when Reborn, a gun-toting toddler, arrives and informs him that he has come to groom Tsuna to become a Mafia boss.
