The Carls disappeared the same way they appeared, in an instant. While the robots were on Earth, they caused confusion and destruction with only their presence. Part of their maelstrom was the sudden viral fame and untimely death of April May: a young woman who stumbled into Carl’s path, giving them their name, becoming their advocate, and putting herself in the middle of an avalanche of conspiracy theories. Months later, April’s friends are trying to find their footing in a post-Carl world. Just as it is starting to seem like the gang may never learn the real story behind the events that changed their lives forever, a series of clues arrive --- mysterious books that seem to predict the future and control the actions of their readers --- all of which seems to suggest that April could be very much alive.

The Carls just appeared. Coming home from work at 3am, 23-year-old April May stumbles across a giant sculpture. Delighted by its appearance and craftsmanship, April and her friend Andy make a video with it, which Andy uploads to YouTube. The next day April wakes up to a viral video and a new life. News quickly spreads that there are Carls in dozens of cities around the world, and April, as their first documentarian, finds herself at the center of an intense international media spotlight. Now April has to deal with the pressure on her relationships, her identity and her safety that this new position brings, all while being on the front lines of the quest to find out not just what the Carls are, but what they want from us.