Trained at Randwick by Michael Freedman, Frolic (images Steve Hart) was second at her only two previous runs at Newcastle and then Canterbury behind the Godolphin colt Marsupial.
Her form looked good for this sales restricted 1200 metre sprint, but an outside gate made her task a little harder.
Ridden patiently by Tommy Berry, Frolic settled at the rear and produced a sizzling burst of speed to zoom home from dead last and win by a length and a quarter over the favourite Sweet Deal.
It was more than five lengths back to the third horse Lets Get Nauti Gal with fillies running the trifecta.
"She has a great turn of foot and they spaced the rest," said Michael Freedman.
"Hopefully she can press on deeper into the autumn from here, but we'll just see how she comes through today.
"I think ultimately she will be better at 1400 metres to a mile, but there might be some nice races for her over The Championships."
A $100,000 Inglis Classic purchase for Blue Sky Bloodstock from the Vinery stud draft, Frolic carries the same colours as ill-fated Group I winner Peeping and runs for the Kelly family's Suffolk Vale partnership managed by Tom Kelly.
By proven Group I sire Husson (Arg), she is the second winner for Group III winning Redoute's Choice mare Leveller, a grand-daughter of former brilliant Group II winner Startling Lass, a full sister to Group I VATC Blue Diamond Stakes winner Midnight Fever.
The yearling full brother to Frolic was sold at the 2017 NZB Select Yearling Sale for just $10,000 to renowned yearling judge Paul Willetts.
A quiet achiever on the Vinery stud roster, Husson covered 54 mares last spring at a fee of $13,200.