"Mirai Nikki Redial" serves as an epilogue to the original "Mirai Nikki" series, providing closure to the narrative and resolving lingering questions. The story picks up after the events of the main series, where Yuki Gasai, the protagonist, has become the new god of the world following the death of his love interest, Yuno Gasai. Yuki, now burdened with the responsibility of reshaping the world, struggles with loneliness and the weight of his newfound power. Despite his efforts to create a peaceful reality, he remains haunted by memories of Yuno and the traumatic events of the survival game.

The narrative shifts focus to Murmur, the game master of the survival game, who remains dissatisfied with the outcome. Murmur devises a plan to reset the timeline, aiming to restore Yuno's existence and correct what she perceives as a flawed conclusion. To achieve this, Murmur enlists the help of Minene Uryu, a former participant in the survival game, who has since become a nun. Minene is tasked with traveling back in time to the second world, where Yuno still exists, and convincing her to return to Yuki's timeline.

In the second world, Yuno lives a seemingly normal life, unaware of the events of the survival game. Minene confronts her, revealing the truth about her past and the existence of Yuki in the alternate timeline. Initially resistant, Yuno eventually agrees to return after realizing the depth of her love for Yuki and the sacrifices made in the original timeline. Together, Yuno and Minene travel back to Yuki's world, where Yuno reunites with Yuki, bringing emotional resolution to their story.

The epilogue concludes with Yuki and Yuno working together as gods to create a harmonious world, free from the chaos of the survival game. The supporting characters, including Minene, are shown living peaceful lives, having moved on from the trauma of their past. The story emphasizes themes of love, redemption, and the enduring connection between Yuki and Yuno, providing a satisfying conclusion to the series.