It's April 1975 and the Khmer Rouge are marching on Phnom Penh. Just three days before the city falls, a small orphaned girl, Li-Da Men, is flown out of the country. Eventually, she ends up as the adopted daughter of the British cook and business woman, Prue Leith and her husband Rayne Kruger. Li-Da has a comfortable and privileged upbringing whilst the country of her birth is returned to Year Zero by the murderous Khmer Rouge, whose Killing Fields claim nearly two million Cambodians. Now, twenty six years later, Li-Da returns to Cambodia in search of the truth: the truth about her past, the truth about her country's past and the truth about what is going on in that country today.