Strongroom

During a bank robbery, manager Mr. Spencer and his secretary Rose are locked in the vault by three small-time crooks, Griff, Len, and Alec, while the gang escapes. Later, when they realize their plan to release the pair has gone wrong, Griff and Len return to the bank to try and release them before the police turn up. The two employees calculate their length of air supply: a maximum of 12 hours if they conserve their breath...