Until everything goes pearshaped and she finds herself being frogmarched to the Cloisters - Dublin's answer to the Betty Ford Clinic. She's outraged. Surely she's not thin enough to be an addict? But on the bright side, she's heard that rehab places are wall-to-wall jucuzzis, gymnasiums and rock stars going tepid turkey. Besides, it's about time she had a little holiday.
Rachel isn't expecting plump, middle-aged men in brown jumpers, and more group therapy than you can shake a stick at. That - alarmingly - she seems to be expected to join in with. Who cares for introspection when all there is to look at is damaged and broken?
Heartsick and Luke-sick, she seeks redemption in the shape of Chris, a Man with a Past. A man who might be more trouble than he's worth.
Rachel is airlifted from addiction to the unfamiliar terrain of adulthood, via a love story or two, in a novel by turns poignant, powerful and seriously funny.