One ageing popstar. One unemployed screenwriter.

Ten years of history. Five months to convince the world they’re in love.

Popstar Sienna Martin is standing on the cliff-edge of her once thriving career.

She’s won ten Grammys, she’s broken streaming records, and she’s the first female solo artist to sell out ten nights at Wembley Stadium…

The press have covered it all: the highs, the lows, the break-ups, the make-ups, the pregnancy rumours. But with one scandalous kiss too many, her fans are abandoning her and her team predict her latest world tour will flop.

Her manager’s plan to revamp her image is a simple one: a stunt relationship to launch the grown-up Sienna Martin.

The candidate for the job? Luc Nicholls. Sienna’s ex and the last man she truly trusted.

But can she still trust him with such a huge secret?