Nicolas Sicoly scored the shootout winner for Guelph as the Storm edged the Owen Sound Attack 4-3.
The Attack got goals from three different players, all in the first period: Petrus Palmu, Santino Centorame and Ethan Szypula.
Luke Burghardt scored the Guelph in the second and James McEwan forced extra time with a short handed goal early in the third.
Michael McNiven stopped 22 shots in the loss. Michael Giugovas made 37 saves for the Storm.