R2 is going through a bad patch. His latest actions have resulted in failure and rows with the Chief Inspector. He consoles himself by visiting Didi’s bar where at least he can cheer himself up. With the help of his inseparable Inspector Cárdenas, who he admires, he tries to solve everything that is put before him, with his more or less heterodox methods including his disguises. Until one day, without asking anyone, he decides to solve a very succulent case which seems to have fallen from heaven; the blackmail suffered by a rich businessman whose wife is threatened with kidnapping. She is also young and pretty, a perfect case for them to shine although Cárdenas and R2 are going to be tested to the limit.