Story Structure — 5 Plot Phases
The Sewer Opportunity
A failed safe-break motivates a more ambitious robbery. The crew identifies a bank vault that can be reached through a nearby sewer and begins obtaining the necessary equipment.
Key Events
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Low-Yield Safe Break — A safe-break produces unexpectedly little money for the robbers.
Location: Unknown premises
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Bank Robbery Planned — The robbery planner begins targeting a specific bank.
Location: Unknown planning location
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Vault Loophole Discovered — The main vault is discovered to be close to a main sewer.
Location: Bank and sewer area
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Equipment Supplier Enlisted — A boat-dealer is recruited to supply equipment for the operation.
Location: Boat-dealer premises
A Reluctant Recruitment
The robbery planner seeks technical help from an architect who initially refuses. Financial pressure eventually leads to a conditional agreement forbidding violence.
Key Events
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Architect Approached — The planner approaches an architect for underground locating expertise.
Location: Architect's workplace
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First Proposal Rejected — The architect angrily rejects the initial approach.
Location: Architect's workplace
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Financial Pressure Mounts — Bank-manager harassment and family business pressure change the architect's position.
Location: Architect's workplace
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Conditional Agreement — The architect agrees to help, provided that no violence is used.
Location: Architect's workplace
The Silent Alarm
Gardner watches from a nearby office as the crew enters the vault through the sewer. Although the alarms summon the police, they are dismissed as defective and switched off.
Key Events
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Lookout Takes Position — Gardner watches the operation from a rented office near the bank. Characters: Gardner
Location: Rented nearby office
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Sewer Entry Begins — The robbery crew uses the sewer loophole to approach the vault. Characters: Gardner, Harry
Location: Main sewer
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Vault Alarm Triggered — Entering the vault from beneath sets off the bank alarms. Characters: Harry
Location: Subterranean bank vault
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Police Reach Bank — The police arrive while the crew continues emptying the vault.
Location: Bank
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Alarms Dismissed — The police decide the alarms are defective and turn them off.
Location: Bank
Floodwater Escape
The crew prepares to leave with the stolen contents just as heavy rain floods the sewer system. The robbers struggle against the torrent, and Harry is injured by sewer gas.
Key Events
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Crew Prepares Escape — The robbery crew prepares to leave with the stolen contents. Characters: Gardner, Harry
Location: Vault and sewer route
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Downpour Floods Sewer — A heavy downpour causes the sewer system to flood. Characters: Gardner, Harry
Location: Sewer system
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Gas Injury Worsens — Harry struggles after being injured by inhaling sewer gas. Characters: Harry
Location: Flooding sewer tunnel
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Escape Against Torrent — The crew fights through a raging torrent while carrying the spoils. Characters: Gardner, Harry
Location: Flooding sewer tunnel
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Harry Swept Away — Harry floats away in the floodwaters and is presumed dead. Characters: Harry
Location: Flooding sewer tunnel
An Unfinished Job
Harry is swept away and presumed dead, while one participant remains in the vault awaiting lower water. The film ends with a visit to the architect's studio and an offer of another job.
Key Events
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Vault Waits Out Flood — One participant remains in the vault, hoping the water level will fall.
Location: Subterranean bank vault
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Another Job Offered — The planner visits the architect and offers another job.
Location: Architect's studio
When architect Stephen Booker loses his partnership, he finds jobs hard to come by, and with money in short supply, he unwittingly becomes involved in a daring scheme to rob one of London's biggest bank vaults.