Koo Seo Jin hits rock bottom when he exploits his authority as the director of a theme park to shut down the beloved circus at Wonderland. Unwilling to bow to her cold-hearted superior, the circus leader Jang Ha Na stands her ground. However, she is taken aback when Seo Jin’s hidden personality emerges, showing unexpected warmth. As she fights to preserve her circus, Ha Na discovers that she must draw out Seo Jin’s more compassionate side using enchantment, wonder, and love. But the question remains: is it Jekyll or Hyde who is paying attention?