The Joe Sharp-trained mare was second on the turf in the Royal North Stakes at Woodbine in her first local start.
Trainer Rachel Halden had the three-year-old Kentucky-bred poised to peak in her third start of the season to take the Grade 3 event.
The Ontario Sires Heritage Series continued on July 26 and produced two new stakes winners for their sires.
In a repeat of last year's victory, the Mark Casse charge powered home to score under Rafael Hernandez in the Grade 3 event.
The Joe Sharp trainee will contest the $175,000 stakes against eight rivals after a strong runner-up effort in the Royal North in June.
The French gelding meets a solid field for the King George VI and Queen Elizabeth Stakes at Ascot on Saturday, a race he won last year.
Duckduckduck tests the Lake Superior waters, while Souper Diva looks to go one better in the Thunder Bay, both tests for three-year-olds.
Kentucky sire The Factor is the sire and grandsire of King's Plate contenders Magical Factor and the filly Luster.
The pair of Grade 3 events includes the well-travelled American Women, while Dakotah Blue stretches out on the inner turf.
The project is completed several weeks ahead schedule and will be tested by horses and riders over the coming weeks.
Racing news as we head into the weeks before the King's Plate: top jocks and trainers, horses changing hands, and one impressive leap.
Gainesway Farm and Andrew Rosen's Luster cruised easily to a 5 1/2 length win in the 71st Woodbine Oaks, punching her Plate ticket.
Vina Arana (IRE) cruised to an easy win, while G T Five Hundred scored an upset and another big win for trainer Dale Desruisseaux on the day.
Domenic Dilalla's Highwaytothemoon, trained by Dale Desruisseaux, answered some questions as he won the Plate Trial at 1 1/8 miles.
There were five stakes races at Assiniboia Downs last week including the Derby Trial and a smashing score by Judo.