On a bitter winter afternoon, seventeen-year-old Cyrus Bolton was doing what he always did, losing himself in video games.

Then the messages began.

Cryptic. Urgent. Impossible to trace.

He dismisses them as harassment, until a strange comet ignites the sky.

As governments insist it's just a passing comet and a temporary outbreak, society collapses in real time. At the center of it all is Cyrus, who has no idea he is the key. He doesn't know why he was chosen.

But someone does.

Told through gripping interviews and reconstructed accounts, The Day They Came is a chilling oral history of humanity's near extinction . . . and the boy who saved them all.