A simple field trip. A hidden clue. A mystery that could change everything.

It's 1998, and when Matt, Francis, and the rest of the Lunch Bunch head out on a school field trip to a historic home, they expect a fun day away from the classroom-not the discovery of a decades-old secret. But one small clue leads to a much bigger mystery... and soon, these curious grade 1's are deep into a case with more twists than their teacher's cursive handwriting.

Armed with courage, creativity, and a few helpful friends from the Cold Case Crime Club, the Lunch Bunch forms a secret kid-run detective agency to get to the bottom of things-before school lets out for the summer. Along the way, they learn that solving a mystery takes more than smarts. It takes teamwork, trust, and a little bit of bravery.

Join the Lunch Bunch as they take on their biggest case yet-and discover just how far a little teamwork can go.