In Killstreak, a group of popular game streamers are mysteriously matched together to play an unreleased survival horror game, Sweet Home. The game, rumored to have been abandoned by its developer due to strange incidents, seems like the perfect stunt to draw in viewers. However, as they progress, glitches and eerie occurrences escalate into terrifying encounters. They discover Sweet Home is haunted by an entity known as The Whistler, a malevolent force tied to the game's origins. When one of them dies in the game and meets the same fate in real life, panic sets in. The remaining streamers must outsmart the game and The Whistler before their time runs out, all while their viewers watch helplessly. With each "killstreak," The Whistler grows stronger, and escape seems impossible. Will they survive, or will the stream end in their demise?