HA human girl named Lily is taken into a legendary vampire castle known as a place where "nothing grows and sunlight never touches."
In this castle live a cold Vampire Queen, a gloomy knight, and a workaholic CEO vampire — and there is an iron rule: no furry living creature is ever allowed inside.
But Lily brings sunflower seeds, colorful stickers, and a stray orange cat, turning the castle upside down.
She changes the Queen's dinner with a hot sausage. She saves an earthworm with mud. She melts the heart of a knight who has slept for a thousand years with her laughter. And she makes the cold-blooded CEO put down his work for the first time.
When Lily feels sad, missing the sunlight and her hometown, the entire vampire family decides to risk being burned by the sun to build her a real sunlight farm.
From being out of place to protecting each other, Lily finally understands: Home is not a castle that stays dark forever. Home is the people who are willing to walk into the sunlight for you.