Sash is at her steely best in Sunday's Fair City on RTÉ One and the RTÉ Player.

Sunday's drama begins as Gwen offers to help Sash find out the identity of the silent partner in McCoy's.

"You can't just let them march in here and walk all over you," says Gwen.

By the end of the teaser trailer for the episode, it appears that Sash knows who she's dealing with.

"We'll be back up and running in the morning," Sash says.

"Oh, that's great news," smiles Dolores.

"Will we drop the act?" Sash replies as the smile disappears from Dolores' face.

Fans can find out what happens next on Sunday on RTÉ One and the RTÉ Player at 8:30pm.

Fair City airs on RTÉ One and the RTÉ Player on Sundays, Tuesdays, Thursdays, and Fridays.

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Catch up on Fair City on the RTÉ Player.