《神探狄仁杰4》是一部由梁冠华、周洁、吴庆哲、杨常青主演的中国国产剧，于2017年上映。该电影由谭友业和何振华执导，属于神探狄仁杰系列电影的第四部。本文将为您介绍这部电影的剧情梗概，并对其进行总结。

故事背景设定在一个乱世之中，唐朝晚期，朝政腐败，内外交困。狄仁杰（梁冠华饰）身为神探，聪明才智过人，受到皇帝的亲信和信任，被派往京城解决一系列离奇案件。而这次，他面临的是一场围绕王朝命运的阴谋。

故事从一场突如其来的政变开始。狄仁杰身边的亲信之一，忠心耿耿的副手独孤大义（周洁饰）受到了不明势力的袭击，为了保护朝廷机密，独孤大义不惜牺牲自己。这一事件引发了狄仁杰的思考和深入调查的决心。

在调查的过程中，狄仁杰结识了一位身份神秘的女子杨玉环（吴庆哲饰）。杨玉环身怀绝技，机智聪明，成为狄仁杰的得力助手。两人携手展开了一段精彩绝伦的合作，破解一个个离奇的谜团。

狄仁杰和杨玉环的调查逐渐揭示了一个庞大的阴谋。背后的幕后黑手企图利用乱世之机，篡位夺权，威胁到了整个王朝的安危。狄仁杰不惧艰险，勇往直前，用自己的智慧和勇气，一一揭开了阴谋的面纱。

"Detective Di Renjie 4" is a Chinese domestic drama starring Liang Guanhua, Zhou Jie, Wu Qingzhe and Yang Changqing. Released in 2017. Directed by Tan Youye and He Zhenhua, the film is the fourth in the Detective Di Renjie series. This article will give you a synopsis of the film's plot and summarize it.

The background of the story is set in a troubled time, in the late Tang Dynasty, the government was corrupt , Internal and external difficulties. Di Renjie (played by Liang Guanhua), as a supernatural detective, was extremely intelligent and trusted by the emperor. He was sent to the capital to solve a series of bizarre cases. But this time, what he faced was a conspiracy surrounding the fate of the dynasty.

The story begins with a sudden coup. One of Di Renjie's confidantes, loyal deputy Dugu Dayi (played by Zhou Jie) was attacked by unknown forces. In order to protect the secrets of the court, Dugu Dayi sacrificed himself. This incident aroused Di Renjie's thinking and determination to investigate in depth.

During the investigation, Di Renjie met a mysterious woman named Yang Yuhuan (played by Wu Qingzhe). Yang Yuhuan possesses unique skills, wit and intelligence, and becomes Di Renjie's right-hand man. The two worked hand in hand to start a wonderful cooperation, solving one by one bizarre mysteries.

The investigation of Di Renjie and Yang Yuhuan gradually revealed a huge conspiracy. The black hands behind the scenes tried to take advantage of the troubled times to usurp the throne and seize power, threatening the safety of the entire dynasty. Di Renjie was not afraid of hardships and dangers, and went forward bravely, using his wisdom and courage to uncover the veil of the conspiracy one by one.