The legendary detective Richard again has to stick his impudent, mustachioed muzzle into other people's affairs in order to sniff out the necessary secrets. This time he found himself on a sea cruise ship along with the furry brethren and their two-legged artist owners, sailing to a talent festival. Richard is in love with the gorgeous cat Athena, who is preparing to perform in a non-standard dance program. But, as luck would have it, someone steals her mistress’s pipe, to the sounds of which Athena was supposed to dance. The number is in jeopardy. Athena is shocked. Now all hope is only for Richard’s sensitive sense of smell, keen hearing and sharp vision. To get on the trail of the attacker, he has to go down into the hold of the ship, where rat-cats live. And with these guys you have to keep your claws ready...