A boy who wants to be a hero. A girl who just wants to be lost in her books. And a Grandpa with a past that won't leave him alone.

Teens Jess and Will are stuck with their grandparents for three weeks while their parents go on a second honeymoon. Neither are too excited to be bored in a house full of off-limits secrets. But when Will's curiosity gets the best of him, the siblings uncover a mysterious box with a hidden message that could change everything. As former Navy SEAL Grandpa plans a rescue mission for a long-lost comrade, the teens must decide if they're ready for a real adventure. Jess and Will must navigate the unknown territory of South Korea... and Grandpa's PTSD. With each new clue comes haunting memories, and time is running out. Can Jess and Will find Grandpa's Comrade before it's too late?

Join Jess and Will as they learn about true bravery, family love, and the price of heroism.