The episode begins with King Pig and Foreman Pig watching a crime movie where a detective is investigating who among the suspects, a sweeper, a chef, and a panicking Butler Pig, was the one who killed the dead Minion Pig. Just as the detective was about to point out the murderer, the film suddenly burned due to the camera being on fire. King Pig quickly blew out the fire but it then came back and destroyed the camera and the film. As he had no way to know what happened in the film, King Pig cried. Suddenly, Foreman Pig had an idea; let King Pig be the detective. Happy with his idea, King Pig decided to take it.
In the next scene, Foreman Pig got the three suspects ready for King Pig to investigate. Then he found a suitable Minion Pig for the victim and proceeded to knock him out with a hammer before passing it to the butler. He then told King Pig to point out the murderer. After some thorough investigation, King Pig concluded that it was the chef who murdered the Minion Pig, disappointing Foreman Pig.
In the next scene, Foreman Pig was using a trail of Pig Cherry Jam as blood to help King Pig conclude it was the Butler who murdered the Minion Pig. Meanwhile, a window washer outside saw something red drip from the hammer> Shocked to think that the red substance was blood, he was prompted to get the police for help. Back to Foreman Pig, he got King Pig to try again. The monarch sniffed the trail and ate it all the way to the "dead" minion pig and conceded it was the "dead" minion pig who killed the minion pig, even though Foreman Pig said it was the butler, causing both the butler and Foreman Pig to be disappointed.
In the following scene, (which by the way only has the butler as the suspect with all the light arrows pointing at him as the murderer to help King Pig and his stupidity) King Pig was trying to see if the butler was the murderer when the doorbell came off, prompting the butler to hand the hammer to King Pig and answer the door. Turns out it was a police pig investigating what happened. When the police pig wanted to know who murdered the minion pig, King Pig activated his brainpower, coming to the conclusion that it was himself who murdered the Minion Pig, causing the police pig to arrest him and Foreman Pig to be shocked.
In the credits, King Pig could still be heard laughing as he was taken away.