Amid the recent string of disappointments in US superhero movies and TV shows, the Korean take on superhero dramas outshines its US counterpart. This series focus on family and human relationship with intensity, suspense, and heartwarming moments. It kept me interested for entire 20 episodes, and I'm eagerly hoping for a second season. It stands in stark contrast to recent US superhero movies that often feel boring. I've wholeheartedly recommended this drama to all my friends. You won't regret watching this drama.