The only Angel Princess of Heaven is betrothed to the Emperor of the Underworld. Unable to accept her future with the Demon King, she realizes that her only choice is to run away. Her plan is to join the human world disguised as a schoolboy! Now all of the Gods from Heaven and Hell are searching high and low on the earth trying to make sure that a wedding happens.

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!

Mi-Hyang - Bi-Wol's fiancee who has a serious crush on him - also comes to the human world determined to get rid of the angel princess. Assuming Ah-Hin is the princess, she tracks her down, only to capture Dong-Young by coincidence. But who knew that Dong-Young was the real princess?! With her secret identity revealed, will Dong-Young be able to escape from this pinch?!

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?!

With the confrontation between Hell's siblings past its climax, Dong-Young uses her Winter General powers to salve Ryung Jin's heart, providing him with a means to save Se-In...in a manner of speaking. And that's not the only surprise the princess of Heaven has up her sleeve as she announces her royal aspirations to the world in this exciting installment of Angel Diary!

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!

The search for the demon Se-In and Bi-Wal's brother Ryung brings about some unlikely alliances between heaven and hell. Confused, Dong-Young seeks out Bi-Wal but once again finds herself with Se-In's life in her hands instead!

Dong-Young confronts Bi-Wal and lets slip a confession of love! But with her engagement to the King of Hell, does this budding relationship stand a chance? As the guardians argue about what to do, Queen Hong appears with an even more earth-shattering revelation!

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?