When a mysterious signal summons the end of the world, it appears that Aubrey (Virginia Gardner) may be the last person left on Earth. Trapped in her dead best friend’s apartment, her only clue is a Mixtape left by her friend, labeled “THIS MIXTAPE WILL SAVE THE WORLD.” Stricken with grief, seemingly alone in the world and surrounded by monstrous creatures, Aubrey’s reality frays at the edges as she’s thrust into the outside world. She begins to put the clues together, uncovering a series of tapes all with pieces of the mystery signal, but can Aubrey overcome her demons and will completing The Signal save the world… or condemn it?