A massive ice floe carries an unexpected passenger across frozen oceans toward a bustling modern city. Dooly, a young titanosaur preserved in ice for millennia, awakens in Seoul's Han River, confused and disoriented in a world completely foreign to his prehistoric existence. Two children, Younghee and Chulsoo, stumble upon the colossal creature and quickly realize they've discovered something impossible. What begins as a chance encounter transforms into an urgent mission. The kids must help Dooly navigate contemporary Seoul while protecting him from those who would exploit such an extraordinary find. As the giant dinosaur learns about humanity's modern world, Younghee and Chulsoo discover what it truly means to care for someone who doesn't belong anywhere on Earth anymore. Their bond deepens through mishaps, laughter, and genuine moments of connection that transcend the gap between species and time itself. This adventure balances wonder with heart, offering a story about friendship that bridges the impossible.