Irin is known for her fiery temper and fearlessness—earning her the nickname "The Devil." But it's just a front, a way to let her younger sister, Inn, shine.

Namcha, her neighbor and a young vet, sees through the act. He's loved Irin since their school days, and even after she ended their relationship without explanation, his feelings never faded.

Now, Namcha is determined to win her back and prove his love is real. But with family, work, and old wounds standing in their way, their path to love is anything but simple.