The runaway angel princess and the four guardians of Heaven - who are in search of her in the human world - are on a field trip. But the princess, who is still disguised as a school boy, is plagued with more troubles as always. Will the guardians be able to save her from all the trouble?! Also, the secret past of beautiful Ah-Hin and powerful Woo-Hyun is about to be revealed. What will be waiting for them after the trip? This ridiculously funny and charming fantasy will draw you right into their world.

Dong-Young is well on her way to becoming the Queen of Heaven, and she and Bi-Wal are now married to boot! But what about the people who helped the two get here? The stories of Bi-Wal's right-hand man, Hee-Young; Ah-Hin, the White Tiger; and Ee-Jung, the Red Phoenix, share the spotlight in this final volume of Angel Diary!

A fight between the members of the four guardians of Heaven breaks out as Woo-Hyun battles to win Ah-Hin's heart! As more characters from heaven and hell come to the human world to search for our runaway angel princess, Dong-Young is feeling more pressured. Her mysterious classmate, Bi-Wal, turns out to have a fiance who also came to the human world to find the Angel princess of Heaven. Will Dong-Young finally get caught?

Dong-Young quickly sets her plan to become the Queen of Heaven in motion by returning to the palace, the remaining Guardians in tow. Meanwhile, Bi-Wal goes back to Hell to bide his time until he can meet Dong-Young again! But can his love withstand the test of time?!

As the injured Se-In's feverish dreams reveal more about the bond between him and Ryung, Dong-Young is torn between watching over him and fretting about everyone else's reaction to her harboring a demon. Little does she know a climactic confrontation is in the making!