Betty Bryant is an ambitious newspaper reporter in love with Dan Barton, a member of a big-city Emergency Squad who are trained to deal with riots, cave-in, explosions, fires and other emergencies where lives are at stake. Slade Wiley, an unscrupulous tunnel builder, finds that his low bid on the Newford Tunnel project is causing him to lose a lot of money, and has underworld leader Nick Burton set off blasts to frighten the stockholders into selling their shares at a low price so he can buy up the stock. Betty is investigating the deal when Wiley and Burton take her on a "tour trip" to the tunnel.

Peter Barton

Betty Bryant

Dan Barton

Chester 'Chesty' Miller

Nick Buller

Slade Wiley

Lt. Murdock

H. Tyler Joyce, editor

Fireman

Ada Miller

Mack - Emergency Squad Sergeant

Workman

Peter

Jimmy

Ambulance Interne

Jack
January 5, 1940

Peter Barton

Betty Bryant

Dan Barton

Chester 'Chesty' Miller

Nick Buller

Slade Wiley

Lt. Murdock

H. Tyler Joyce, editor

Fireman

Ada Miller

Mack - Emergency Squad Sergeant

Workman

Peter

Jimmy

Ambulance Interne

Jack
