In the ancient kingdom, Blackthorne and Juzi shared a secret that could cost them both their lives.This secret, like a double-edged sword, hangs over their heads and may fall at any time.Therefore, they must exercise caution and be on the lookout for anyone who might reveal their secrets.

Yabutashige, as a loyal guardian of the kingdom, knows the seriousness of this secret.Not only does he have to protect the kingdom, but he also has to find the spy hiding in the shadows who is trying to leak the secrets of Blackthorne and Mariko to Lord Toranaga.Yasu Shige knew that once the secret was revealed, the consequences would be disastrous.

In order to find out the spy, Zuo Zhong started a secret investigation.He went deep into the palace and carefully observed everyone's movements, trying to find clues.However, the spy was so well hidden that he always seemed to be able to avoid Yasushige's sight.

During the investigation, Yasu Shige couldn't help but start thinking, who is this spy?Why do they do this?Is it for power?Or for money?No matter what the reason was, Yasu Shige was determined to find this spy.

At the same time, Blackthorn and Ju Zi were also secretly discussing countermeasures.They know that every move they make may attract the attention of spies, so they must be more careful.They decided to strengthen their defenses and look for opportunities to catch the spies in one fell swoop.

As time passed, Yabusuge's investigation gradually made progress.He discovers some suspicious clues that seem to point to an unexpected person.Blackthorn and Ju Zi were also observing secretly, trying to find out the spies' flaws.

In the end, in a well-planned operation, Blackthorne, Mariko and Yabushige succeeded in uncovering the spy.It turned out that this spy was actually a close confidant of Lord Toranaga.In the face of conclusive evidence, the spy could not deny his crime and had to admit his crime.