Your old grandfather was trapped in his own house, he would not be able to go out, because he forgot where the hidden key to the front door. You'll have to look for the key or replace it. The apartment is filled with different items grandfather interior, who are also puzzles with hiding places. Santa loves riddles, but memory fails, and it does not tell you the solution, find themselves, at the request of Granddaddy look for coins from the collection.