Things are going missing. Wallets. Watches. And weirdly, lunchboxes. The victims? All Primary 1 children. Is this how Brightstar Primary School welcomes its new students? The Extraordinary Losers - Darryl, Clendestino, Mundi and Janice - now in Primary 6, can't bear to stand idly by. A trap is set to nab the thief. But it backfires, and now, they find themselves in serious trouble. Will they uncover the devious plot? Will they be able to stop the Lunchbox Thief? Or will this mark the end of the Extraordinary Losers?