After The Doctor picks up Amy and Rory from their honeymoon,the TARDIS goes wibbly wobbly and ends up in a place The Doctor hasn't been before...Camelot,Where he meets Merlin.A young Warlock
lily who was at the library while everyone was at dinner returned to the common room to get a good night sleep only to find cake and a letter saying " Dear Lily , Eat it " who could have sent her the letter and the cake...