Bernie and Chet get a job to find a missing teenage girl. Both of them have ways of figuring out the case, but since humans don't communicate very well with animals, they can't put all the pieces of the puzzle together right away. Eventually, Bernie finds the missing girl (waaaay after Chet found her) and the case is closed!
Chet isn't the brightest dog-he's certainly no Enzo!-but he's smart enough to figure out who the bad guys are. He isn't too fond of cats, which is a problem for me, but I didn't mind reading about him. In fact, he's got his own blog, too. You should check it out!