From A Wiki of Ice and Fire
|Book||The Hedge Knight (appears)|
Plummer was the steward of Ashford during the reign of Daeron II Targaryen.
Plummer had a narrow, pinched face and thin grey hair.
Plummer was the master of the games for the tourney at Ashford Meadow. He initially rejected Ser Duncan the Tall's entry into the tourney on the grounds that no one knew who he was, until Prince Baelor Targaryen vouched for him.