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This drama was a great drama! It had an interesting plot which I never expected from normal Korean dramas. This drama is based on a woman who lost his son in 1997 and remade him as an android robot, which looks exactly like her lost son. But in the 21st century, the original son called Sin, got in a car crash in Czech Republic, the android robot that looks exactly like Sin has to replace the real one. The story gets more and more interesting as you keep watching it. I recommend it to people who are 15 years old. Was this review helpful to you?