Sherlock's on the case as his world begins to crossover with the Moriarity Brothers and their underworld machinizations. Both groups find themselves entangled with Irene Adler, a courtesan with high-ranking clientele. Her latest actions threaten the British Crown as we see Sherlock's brother Mycroft hiring Albert Moriarity with retrieving classified information and silencing Adler permanently. Meanwhile, Irene hatches a plan to endear herself to Sherlock in the hopes of preventing her assassination.

To prepare for reincarnation in another world, Kelvin gives up select memories from his previous life in exchange for powerful abilities, additional skill points, and an S-class summoner title. As a bonus, the goddess facilitating his rebirth, Melfina, offers him a choice of any companion to give him a head start in his summoner role. Kelvin—who has fallen head over heels for Melfina at first sight—promptly chooses the deity, confident that his passionate feelings for her will resurface even without all of his memories. Kelvin embarks on his exciting new journey with Melfina as his guide. However, in order to summon his beloved goddess' physical form, he needs to acquire significant amounts of mana points—and the best way to accomplish this is to level up by fighting strong enemies and making contracts with even stronger companions.

Unleashing a devastating surprise attack, flying ninjas from the Land of Sky are seeking revenge against their old enemy Konohagakure. Despite his eagerness to join the fight, Naruto Uzumaki is held up by Shinnou, a mysterious doctor who requires his assistance to save an injured person. While delivering the wounded man to the hospital, Naruto has an unexpected encounter with Amaru—a stormy youngster from a neighboring village desperately looking for Shinnou's help.

Meanwhile, as the invaders withdraw to restore their forces, Tsunade seizes the opportunity to dispatch a small team including Sai, Shikamaru Nara, and Kakashi Hatake to strike down their base. Simultaneously, she commissions Naruto, Sakura Haruno, and Hinata Hyuuga to accompany Shinnou and Amaru on their journey. During this time, however, Orochimaru has his own schemes: he orders Sasuke Uchiha to bring him the doctor who specializes in the reincarnation technique.

As the escort group accidentally uncovers the sinister truth behind the attacks, tumultuous plans are set in motion. But even when confronted with an unforeseen reunion, Naruto does not waver in his endeavor to end the warfare and its disastrous effects.

[Written by MAL Rewrite]

Alternate 23rd episode of Steins;Gate, which leads into the story of Steins;Gate 0. It was included with the Steins;Gate Complete Blu-ray Box.