Treasure of Pirates

You have heard rumors about a golden compass which is not leading to the North, but to the next major treasure. The person to whom the compass belongs will earn infinite gold and fame. Just the right item for you as buccaneers! You and your crew are just about to drink one or two pints at the bar near the docks when you hear gunfire from outside. A mutiny just started! It seems like the crew of another ship couldn’t manage to divide the latest loot and now they started revolting. For his own safety the captain locked himself up below the deck but now can’t find a way out of there. In his despair he is offering you nothing less but the golden compass if you can get him free. Can you manage to free the captain before the other pirates find out about the secret behind those doors?