Everything Jake Nelson has wished for is coming true. He's finally getting to know his long-lost father, school is a lot less scary with best friends Jasmine and Lanny, and their company, Sasquatch Hunters of Washington, Inc., is taking off. When Jasmine's father invites everyone to a long weekend at their cabin on Harriman Lake, the kids jump at the chance. Legend has it that there is a treasure buried somewhere in the woods nearby, and the "hairy man" the lake is named after might be a Sasquatch. But the deeper they dive into their investigation, tricky puzzles, mysterious locals, and new friendships threaten to break the group apart. Jake may be able to follow the treasure's clues, but will he lose something even more valuable along the way?