Kim Mi Young goes into the wrong hotel room because the hotel door number accidentally changes, and the door is propped open by the mischief-making drugged liquid makers. When the two cross paths one night after separately having drunk a drugged liquid, a comedy of errors occurs. Kim Mi Young ( Jang Nara) is an average-looking secretary in a law firm who earned the nickname “Post-It” for her inability to say no to her colleagues who dump work on her. Lee Gun ( Jang Hyuk) is the successor to a large company run by his family.