Check out the official "Radioflash" trailer starring Brighton Sharbino, Dominic Monaghan, Will Patton, Fionnula Flanagan, Miles Anderson and Michael Filipowich

When a nuclear device causes an electromagnetic pulse that kills power to more than 200 million people, a teenage girl must help lead her family to survival in a dark new world.

https://www.zerotrailers.com/title/radioflash/