Scott Turner has 3 days left in the local police department before he moves to a bigger city to get some 'real' cases—not just misdemeanors. When Amos Reed is murdered, Scott sets himself on the case, but the closest thing to a witness to the murder is Reed's dog, Hooch, which Scott has to take care of—to avoid Hooch being 'put to sleep'.
To prove his brother's innocence, undercover officer Nick enrolls in high school again, dealing with crushes, bullies, humiliations, popularity swings, and quirky teachers and staff to find the real murderer.