A Hidden Tracker
For the rest of the holiday, Caleb locked himself in his room because he was grounded. He refused to come out during the day. It even got so bad that he did not want to eat or shower. Caleb even tried to climb out the window once but was caught by Jessica.
Luckily nothing else happened during the holiday. But Caleb, at one point, even stopped speaking to his parents. They had heard him in his room doing something with his backpack. They had already put the tracker inside of it. Did he find it?