Best-selling author Dorothy Koomson's novels have been translated into 28 languages. In The Ice Cream Girls, 18-year-old Serena Gorringe and 16-year-old Poppy Carlisle were tried for the murder of their teacher -- but only Poppy was convicted of the crime. Twenty years later, Poppy is released from prison -- and she's determined to force Serena to admit her part in the killing.