Harriet (Haitch) Boswell's career as an artist could be about to go stratospheric. She's been nominated for a prestigious bursary that would change everything. To secure it, she needs to see off five other hopefuls and charm the man who holds the purse strings during a weekend at a stunning location in Spain.
But just before she's due to leave, she falls ill. There's no way she can attend the event. Perhaps there's a solution... her twin sister, Tilda.
But Tilda's life is in turmoil. Her husband Sam has left her, declaring his love for a mystery woman. Spending a weekend schmoozing with the cream of the creative world while pretending to be her sister, is the very last thing she wants to do.
But the bonds of sisterhood are strong. Haitch begs her, and Tilda agrees.
What if she's discovered as an imposter? There's Haitch's egotistical agent Damian to get past first. Then there's the small matter of surviving the selection process - all five nominees are pitted against each other in an intellectual beauty contest.
And then when someone discovers a body the next day, no one is prepared for what comes next...