There's something about painter John Sewell that Nadine Davies can't resist. It's not just his looks or his talent or his sense of purpose - she herself has all those attributes. What's more, he's arrogant, dictatorial - and he has other women. It can't be love and it's nothing like friendship. He makes her feel emotions she's never felt before.
And there's another man, too. A man like Sewell who makes her do things she'd never dreamed of - and she adores it. She's under their spell, in thrall to their dangerous desires . . .