(Sequel to Four Years Past) Our trio of couples have arrived at a cross roads in their lives. With five children aged three and a half between them, will they put their love life, their children, or their jobs first? And, where is Ji Hoo, no one has seen him over two years. Is he ever going to return?

Ji Hoo, who is working at a hospital, unexpectedly falls for a pretty, mysterious patient. Woo Bin discovers he is engaged to another warlord's daughter. Both girls are unprepared for the lifestyle and friendship of the F4.

Jan Di and Jun Pyo are engaged and everyone is back in town for the wedding, including a certain Casanova. Yi Jung insists he and Ga Eul have nothing going on but, with out his knowledge, two friends are planning to change that and cause chaos in the process.

Chae-Kyung and Shin are finally back in the Republic of Korea. All her sins have been erased and she is now hailed as the heroine by the public. The royal family loves her. Everything is going smoothly... right?