Milk & Serial (2024)

Best friends and roommates Marshall "Milk" and Steve "Seven" run Prank Bros, a prank channel, together on YouTube. Before Milk's birthday party at their apartment, Seven films himself buying a gun and blanks to prank him.

The party is attended by several of their friends, including Link, Naomi, and Naomi's girlfriend Lara. During a game of "Never Have I Ever", Milk admits to killing a cat, making everyone else uncomfortable. Seven's improv friend, hired by him for the prank, arrives and shoots Naomi with a blank, impressing Milk. Later, their elderly neighbor Greg knocks to complain about the noise. While returning from a trip to 7-Eleven, the friends see Greg standing motionless on a street corner, which Milk dismisses as another prank.

The next day, Seven and Milk encounter Greg sitting on their couch downstairs. Milk goes to apologize, only to find that Greg has gone upstairs, where he is having a breakdown. Milk calms Greg by promising to have dinner with him, but before they leave, a heartbroken Naomi arrives, claiming Lara broke up with her via text.

Milk and Seven dine with Greg at his apartment, where Greg seemingly drugs them before tying them up and driving them to a remote desert. After Seven shoots Greg in self-defense, Milk reveals that he orchestrated the entire situation as a prank; Greg is a hired actor, and the gun Seven used is the same one from the birthday prank. Seven is thrilled at the prospect of increased viewership from the prank, but his excitement dissipates upon discovering that Greg is actually dead; Seven blames the man who sold him the gun.

Past footage reveals that Milk abducted Lara after the party and tied her up in a secret hideout, then used her phone to break up with Naomi. Milk confesses to the camera that he is jealous of Seven's popularity on their channel, and has come up with an elaborate plan to frame Seven for murder as revenge, which involved swapping the blanks with real bullets.

In the present, Milk gets Seven to bury Greg's body. The next day, Milk gaslights a traumatized Seven and provokes him into beating him. Milk then goes to bludgeon Lara to death. After Greg's son Frank confronts them about Greg's disappearance, they use Greg's phone to make it appear as though Greg has gone to Las Vegas. When this backfires, Milk convinces Seven to go to Frank's house to distract him so Milk can stab him to death. Having had enough of Milk's destructive actions and apparent lack of remorse at having caused the deaths of two people, Seven angrily declares that he is quitting the channel.

Link and Naomi decide to investigate why Seven attacked Milk, and discover a box under Milk's bed filled with vials of blood labeled with different names, including one with Lara's name. The box also contains a key, which leads them to Milk's lair and Lara's corpse.

As Milk tries to clean up the blood, a guilt-ridden Seven begs Milk to either kill him or turn him in. Milk giddily speaks to the camera, explaining to the viewer that he aspires to be remembered as the most creative serial killer in history, and that he believes he has accomplished this goal by not directly killing Seven, but instead creating a series of circumstances that he hopes will lead to Seven committing suicide. Just then, Seven enters and shoots Milk, who subsequently drops the camera. Another gunshot rings out. After the credits roll, the camera is picked up.