In an all-too-possible near future, when genetic engineering has become the norm for humans, not just crops, parents are prepared to take incalculable risks to ensure that their babies are perfect - altering genes that may cause illness, and more. Susan has been trying for a baby for years, and when an impulsive one-night stand makes her dream come true, she'll do anything to keep her daughter and ensure her husband doesn't find out - including the unthinkable. She believes her secret is safe. For now. But as governments embark on a perilous genetic arms race and children around the globe start experiencing a host of distressing symptoms - even taking their own lives - something truly horrendous is unleashed. Because those children have only one thing in common, and people are starting to ask questions.