"I deliver everything that the post office service does not handle." Eun-ha, who is a normal junkyard employee, secretly works as a delivery clerk that deals with unusual delivery requests.
Due to that accident, Yi-Young loses her memory and Soo-Jin goes missing. Under that situation, Yi-Young regains her diving skills, but her strong desire to keep her position as a diva and Soo-Jin's disappearance push her into madness.
'A Christmas Carol' is a story about a twin brother who goes to a juvenile detention center on his own to avenge the death of his twin brother.