If you found out we weren’t alone, if someone showed you, proved it to you, would that frighten you?

When meteorologist Margaret Fairchild (Emily Blunt) finds herself at the centre of a bizarre on-set incident, she crosses paths with cybersecurity expert Daniel Kellner (Josh O'Connor) who claims to understand what happened to her – and to have proof that we're not alone in the universe.

With help from scientist Hugh Wakefield (Colman Domingo), Daniel and Margaret begin a quest for full disclosure. However, a powerful government contractor (Colin Firth) will stop at nothing to ensure the truth remains under wraps.