The mystery of Cabin Island

Two teenage brothers and their friends plan a winter camping trip to a remote, cliff-guarded island with an old abandoned cabin, hoping for holiday recreation. What begins as outdoor adventure turns into a layered mystery after suspicious visitors, stolen supplies, and a cryptic notebook appear; the youths mount night watches, pursue clues, and face risky situations including a collapsing chimney. Through careful observation, deduction, and solving a simple cipher they unravel who is behind the thefts and the competing claim on the property, leading to the recovery of evidence and a satisfying resolution for the rightful owner.