Choi Seon-man (Ryu Seung-ryong) manages a small machinery company where Go Baek-joong (Ahn Jae-hong) works in the capacity of an intern. Baek-joong harbours one-sided feelings for Choi Min-ha (Kim Yoo-jung), Seon-man’s daughter. Things take a turn for the worse when one fine morning, a mysterious machine, supposedly meant to alleviate stress, arrives at their office’s doorstep, which they assume is an expected shipment from a research scholar. A few moments later, when Min-ha arrives at the office, she spots the machine, which looks like a cupboard, and steps inside it, believing that it will relieve her fatigue. However, what happens next shocks Seon-man and Baek-joong to the core; Min-ha transforms into a chicken nugget! Now the two, keeping it a secret from the world, embark on a mission to turn her back into a human. And while doing so, they stumble upon dark secrets and encounter various eccentric characters. Will they be able to get her back, or will they lose her forever? That’s what the story highlights.