At just twenty years old, Tara Tremain has everything: a trainee doctor, engaged to the man of her dreams -- a passionate American biology student called Alex Carter. But just when life seems perfect, Alex betrays her in the worst way possible. Ten years later, she's moved on, with a successful career, good friends and a man who loves her. But when she's pulled back into her wealthy family's orbit for an unmissable party in the heart of Costa Rica, she finds herself flung into crisis: a child is desperately ill and the only remedy is several days' trek into the heart of the jungle. There's only one person who can help, but it's the man who shattered her heart a decade before. And how can she trust him, of all people?