A high schooler finds a fellow student stuck in a perilous time trap. Can she help rescue him, or will secretive forces thwart her efforts?

Carol is a 17-year-old teenager, the daughter of a Brazilian dancer and a South Korean, who lives a challenging journey of overcoming, acceptance and self-knowledge after the death of her mother and the abandonment of her father, who decides to return to South Korea. In a conflicting relationship with her ancestry, she denies knowing any topic better than South Korean culture, but her life changes after a unique discovery: her wardrobe is actually a magic portal that connects her room to a group of k-pop of great success at the moment, ACT.