On a hot July day in 1967, Odelle Bastien climbs the stone steps of the Skelton gallery in London, knowing that her life is about to change forever. Having struggled to find her place in the city since she arrived from Trinidad five years ago, she has been offered a job as a typist under the tutelage of the glamorous and enigmatic Marjorie Quick. But though Quick takes Odelle into her confidence, and unlocks a potential she didn’t know she had, she remains a mystery – no more so than when a lost masterpiece with a secret history is delivered to the gallery.