It is not galleons of treasure that attract the famous scuba diver John Chatterton and the amateur historian Mattera. Their dream is to find the ship of the mysterious Captain Bannister in order to return the name of the brave and elusive pirate to history. In other words, get ahead of competitors who are ready for anything, throw away book knowledge, do not trust the readings of modern instruments, and start thinking like a pirate... Exciting deep-sea dives, untold treasures and incredible secrets - all this awaits two desperate brave men in search of the unknown!