In a post-apocalyptic future after "The Quiet Rapture" event, a convict explores a blood ocean on a desolate moon using a submarine called the "Iron Lung" to search for missing stars/planets.
Science teacher Ryland Grace wakes up alone on a spaceship light-years from Earth. As his memory returns, he uncovers a mission to stop a mysterious substance killing the sun, and save Earth. An unexpected friendship may be the key.
