Eighteen-year-old Rachel is a dreamy, idealistic student at the Slade and wants nothing more than to become a painter. When she paints an unflattering portrait of the local vicar, her aunt decides that this ungrateful girl doesn’t deserve to come on her planned trip to Egypt (despite Rachel’s obsession with Akhenaten and Nefertiti). Instead, Rachel is packed off for a year-long placement with an English family living in Brittany, to act as companion to their teenage daughter Thalia. Rachel’s first impression is that the Pembertons are much the same as any other military family wintering in a cheap, congenial climate. But, when Colonel Tom Pemberton returns to his regiment in India, she begins to notice deeper currents swirling through his household and, in particular, running in the veins of unloved, overlooked, lonely Thalia.