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The Secret Behind the Underground Room

EpisodeEp. 173

Konohamaru's undercover infiltration of Victor's company comes to a head as the truth about the Hashirama Cell experiments surfaces. A God Tree begins to sprout below ground, fed by living victims, while Boruto and Sarada shield Mia from the danger closing in.

Japanese Airdate: November 8, 2020
English Airdate: May 17, 2022
Opening Song: Starting and Growing
Ending Song: Central
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Summary

The daimyo of the Land of Valleys arrives to a warm welcome from Victor, just as Boruto and Sarada reach the same region. The two young ninja compare notes on Konohamaru's assignment, Mitsuki's wound, and their failure to return Anato to his wife Mia before finally meeting with her. Over in Otogakure, Mitsuki frets about his teammates, but Orochimaru cautions that his replacement organs are still weeks from being ready and his health remains fragile. Proud that the boy acted of his own accord yet displeased by his reliance on Sage Transformation, Orochimaru had dispatched Suigetsu to look in on the group, and the report that the rest of Team 7 sits in the Land of Valleys only deepens Mitsuki's worry.

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Key Events

When Mitsuki resolves to rejoin his friends, Log puts him under with a sedative. At the company, Victor guides the daimyo's escort into a restricted wing, where the decontamination process quietly takes hold of them. Boasting of the Hashirama Cell, Victor claims to stand on the threshold of curing untreatable illnesses and abolishing old age. The daimyo pledges to shield the research, but one guard shakes him free of the genjutsu, exposing the human test subjects. Those guards prove to be Konohamaru and Mugino in disguise, and Mugino severs Victor's right arm.

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Notes

The detached limb crawls back to Victor on its own after triggering countermeasures, and he flings Mugino away with a Wind Release blast as his employees swarm the Konoha jonin. A God Tree sapling erupts inside the laboratory, and Victor feeds the Iwa doctor to it while his secretary herds more staff in to serve as nourishment. As the ground shudders, Boruto and Sarada urge Mia to safety and move to back up the jonin, while Victor and his secretary watch the tree's bud unfurl. The episode is part of the Kara Actuation arc, airing in Japan on November 8, 2020, and in English on May 17, 2022.

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Frequently Asked Questions

What happens in The Secret Behind the Underground Room?

In The Secret Behind the Underground Room, Konohamaru Sarutobi's undercover infiltration of Victor's company is exposed when guards reveal human test subjects tied to the Hashirama Cell experiments. A God Tree sapling erupts inside the laboratory, feeding on people, while Boruto Uzumaki and Sarada Uchiha work to keep Mia safe.

Who is Victor in this episode?

Victor is the head of the company under investigation in The Secret Behind the Underground Room, who claims his Hashirama Cell research can cure untreatable illnesses and abolish old age. He is exposed as running human experiments after Konohamaru and Mugino, disguised as escort guards, break the genjutsu shielding the operation.

How is Victor injured in The Secret Behind the Underground Room?

Mugino severs Victor's right arm after being exposed as one of the disguised Konoha jonin guarding the daimyo. The detached limb crawls back to Victor on its own, and he retaliates with a Wind Release blast that flings Mugino away.

What is the God Tree in this episode?

The God Tree is a sapling that erupts inside Victor's laboratory in The Secret Behind the Underground Room, fed by living victims including an Iwa doctor that Victor feeds to it. Victor and his secretary watch its bud unfurl as the ground shudders around them.

Why is Mitsuki worried in The Secret Behind the Underground Room?

Mitsuki is worried in Otogakure because his teammates are investigating danger in the Land of Valleys while his own replacement organs, damaged from an earlier wound, are still weeks from being ready. Orochimaru has Log sedate him after Mitsuki resolves to rejoin his friends despite his fragile health.

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This content is original writing by Daddy Jim Headquarters based on the Naruto anime series, manga, and official materials. Episode and chapter references are cited where applicable.

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