The Grape Escape

Welcome to the traditional vineyards of “The Golden Grape Winery”! Today’s yield has been big so it is late night and you are about to lock the warehouse’s door and leave, right when the door behind you closes. You remember that there is only one set of keys, the one used to open the door is left outside. The only possible way to escape the storage room is to enter the 4-digit PIN in the electronic device next to the door, which releases the door’s lock. You must hurry though; the storage also functions as a high-humidity refrigerator and keeps the grapes cool at 4ºC. You have 45 minutes to find the PIN following clues that you will find in the winery’s warehouse. Hurry up! Find the keys and escape before the refrigerator begins to operate!