Steve's lie about liking to break codes comes back to haunt him when Quinn gives him a message to decode, and he must either figure out the code or tell Quinn the truth.
Lin and Kris are competing for the best grade on their science papers, but as the due date draws near, Lin suspects foul play when her chief resource, a library book, suddenly disappears.
Carl knows how important it is that he pass Mrs. Scott's history test, so he is baffled when the exam goes missing after he turns it in, and must work fast to prove someone else had a hand in its disappearance.
Steve's lie about liking to break codes comes back to haunt him when Quinn gives him a message to decode, and he must either figure out the code or tell Quinn the truth.
Lin and Kris are competing for the best grade on their science papers, but as the due date draws near, Lin suspects foul play when her chief resource, a library book, suddenly disappears.
Carl and Todd are not excited about having to go on a field trip for Mr. Zane's class, but when the permission slips mysteriously disappear and someone makes two phone calls to the bus company, the boys begin to wonder if they are lucky or if something more devious is happening.