[4] Hurry On sired numerous other major winners including Captain Cuttle, Coronach, Call Boy, Pennycomequick, Cresta Run and Precipitation.

Plack's dam Groat was a granddaughter of Montem, a broodmare whose other descendants included Sweet Solera, Aunt Edith, Colombo, Ellangowan and Blind Luck.

[6] On 19 October at Newmarket Plack contested the Middle Park Stakes over six furlongs and finished second, beaten one and a half lengths by the Aga Khan III's colt Diophon,[7] after pursuing the winner "gamely to the end".

Plack made her second season debut in the Brandon Handicap over nine furlongs at Newmarket in April for which she carried top weight of 132 pounds and finished third behind Brig o' Doon and MacCarthy More.

[3] The filly was then stepped up in distance and matched against older horses in the Ascot Gold Cup over two and a half miles but after being badly hampered by Papyrus[2] she finished unplaced behind the French four-year-old Massine.

Ridden by Charlie Smirke she started odds-on favourite and won by one and a half lengths from the Prince of Wales's Stakes winner Eastern Monarch.

Plack returned to her favoured extended distance in the Goodwood Cup and appeared to be going very easily when she clipped the heels of the horse in front, stumbled badly and unseated Charlie Elliott.