Your father is an official in the royal court, one day you want to surprise him by bringing him lunch but walking through the grounds you forget which palace he works in, you always recall him saying something about the palace with the red roof, so maybe that's it.

Little did you know you entered the crown prince's palace.

As you walk through the palace you don't find anyone, but find a notable room, opening the door the room is in complete darkness, and you smell someone inside smoking.