|Melanie Lynskey||Pauline Yvonne (Parker) Rieper|
|Kate Winslet||Juliet Hulme|
|Sarah Peirse||Honora Parker Rieper|
|Diana Kent||Hilda Hulme|
|Clive Merrison||Dr. Henry Hulme|
|Simon O'Connor||Herbert Rieper|
Wealthy and precocious teenager Juliet transfers from England to Christchurch, New Zealand, with her family, and forms a bond with the quiet, brooding Pauline through their shared love of handsome big screen tenor Mario Lanza and games of make believe. But when their parents begin to suspect that their increasingly intense friendship is becoming unhealthy, the girls decide to run away to America, hatching a dark plan for those who threaten to keep them apart.