Goo Seo-jin is a third-generation chaebol who runs the theme park Wonder Land. He seemingly has everything — looks, brains, and fortune. But a traumatic incident in his childhood resulted in Seo-jin having a split personality — one is a cold, ruthless man, while the other is the polar opposite, someone kind and gentle. Because of this, he vows never to date or marry. Seo-jin wants to get rid of the circus show at Wonder Land due to low ticket sales and high overhead costs, but he butts heads with circus master Jang Ha-na. Ha-na insists on saving the failing circus and dreams of revamping it back to its former glory. She soon finds herself falling for both of Seo-jin's personalities.
Chairman Goo, Seo-jin's dad, tries to send Seo-jin abroad. Meanwhile, Tae-joo threatens to kill Dr. Kang.
Seo-jin shows Ha-na that Robin is his other self and says they have a condition called DID.
Tae-joo watches Seo-jin's video. Also, Seo-jin tells Ha-na he will take loving Robin to mean loving him too.
Robin tells Seo-jin to suspect those around him. Tae-joo is flustered as he sees Seo-jin sharing his memory.
Seo-jin tells Tae-joo that his dad helped the kidnapper, but he distrusts him. Meanwhile, Ha-na falls ill.
Tae-joo says Seo-jin lied about his father to survive, but Seo-jin says he'll bet everything that it's true.
Robin asks Ha-na to build a new workshop together. Meanwhile, Seo-jin comes to the circus crew's office.
Ha-na gets trapped by reporters at Robin's. Seo-jin tries to tell them he has a DID, but Ha-na stops him.
Seo-jin thanks Ha-na for allowing Robin to exist, and news articles about him and Robin help Wonderland.
Robin notices his memory loss. Seo-jin gains some of Robin's memories and worries about what to tell Ha-na.
Robin and Ha-na get married, but Robin finds it hard to draw Ha-na as well as he did and realizes it's time.
A chaebol executive with a split personality spars with a circus leader determined to save her troupe, which he’s trying to eject from his theme park.
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