While searching the attic, Captain Haddock finds the trace of his ancestor, the Knight of Hadoque. This legendary sea wolf has made himself famous for his troubles with the cruel pirate Rackham the Red. Another maritime novel? Certainly not! For the knight becomes the custodian of a fabulous treasure. For Tintin, Haddock and a series of thugs, it's about finding him. But the tracks and the riddles multiply.
