Sun Jeong shares the same birthday as her three kids, Bit Chae Woon, Hae Deun, and Ra Hoon, so they plan to have a big party in the evening. Sun Jeong's sister Man Jeong visits the family to celebrate her birthday. Somehow, Chae Woon isn't too happy to see Man Jeong. Jae Hee goes to see Jung Won and Seo A be with them on a special day. Meanwhile, Chae Woon gets a call she's been waiting for.