Need a hint?
The words have been shifted in some way.
The image on the left conatins +1, it shows the letters have been shifted by 1.
You need to move the letters back 1 to reveal the answer.
The main message, if decoded gives details about the office Christmas party.
The bit we need is the large letters "GPSUZ FJHIU". Shifting these back one in the
alphabet (undoing the +1) gives forty eight.
