The problem centers around his owner, an orphaned young lady named Miss Tomasina, who has been kidnapped by mountain bandits under the order of her legal guardian, and with only three days before she comes of age to claim her parents' properties as hers.

Bernard decides to take the case, in the process gathering valuable clues and going through several mishaps, like being kept as a pet for a few minutes by a bunch of school girls and almost getting roasted alive by two housemaids.

When she arrives home from the mountains, she realises that Bernard is nowhere to be found and worriedly runs to his flat to see if he is not terribly ill, ready to nurse him all night if necessary.

She refuses to eat or sleep, and becomes very taciturn, thinking of nothing except her dear Bernard, lost in some desolate corner of the Wolf Range, with only a stuffed toy to accompany him.

The most hilarious events occur at this point, as well as a very bleak one: the legal guardian of Miss Tomasina dies from a heart attack in the middle of the court.