私家侦探尼克和芭芭拉接到一桩离奇的命案委托，任务是前往S牧场调查一起谋杀案。这个Circle S Ranch在表面上是一个美丽的度假胜地，然而，暗地里却隐藏着滥交的不可告人的秘密。为了能够潜入这个滥交圈子，尼克和芭芭拉决定采取冒险的方式，通过与牧场上各种滥交者发生关系来收集信息

在调查的过程中，尼克和芭芭拉亦师亦友，彼此默契配合。他们时常为了任务而不得不做出一些让彼此感到尴尬的举动，但也因此更加亲近。这种近距离的合作让他们逐渐建立了深厚的信任和默契，成为了无话不谈的知己。

随着调查的深入，两人渐渐揭开了S牧场背后的黑幕。原本只是一起谋杀案的任务，却渐渐演变成了揭露一个庞大阴谋的行动。滥交圈子里的每个人都似乎有着不为人知的秘密，牵扯出一个个扑朔迷离的线索。而更令人意外的是，他们发现这背后的真相竟然涉及到一些高层势力，牵扯范围之广超乎他们的想象。

Private detectives Nick and Barbara received a bizarre murder commission, and the task was to go to S Ranch to investigate a murder case. This Circle S Ranch is a beautiful resort on the surface, however, there are dark secrets of promiscuity hidden in the dark. In order to be able to infiltrate this promiscuous circle, Nick and Barbara decide to take the risky approach of gathering information by having relationships with various promiscuous people on the ranch

During the investigation, Nick and Barbara were both mentors and friends, and cooperated with each other tacitly. They often have to do things that embarrass each other because of the mission, but they also get closer because of it. This kind of close cooperation has gradually established a deep trust and tacit understanding between them, and they have become confidants who talk about everything.

As the investigation deepened, the two gradually uncovered the shady behind the S Ranch. What started out as a murder mission has gradually turned into an operation to uncover a huge conspiracy. Everyone in the promiscuous circle seems to have an unknown secret, and confusing clues are involved. What is even more surprising is that they discovered that the truth behind this actually involved some high-level forces, and the scope of the involvement was beyond their imagination.