For merchant bankers, success means secrecy; passwords and code names ensure conversations stay private. However, they reckoned without London cabbies Terry, Len, and 'Einstein', who know the rewards of keeping their ears pricked and their noses in The FT.
Making money fast is their object, as Len's daughter Poppy is losing her struggle with Cystic Fibrosis. While scheming to give Poppy a chance of survival, they become embroiled in a murder and the politics of their target bank, Skidder Barton. With everyone double dealing - inside the bank and out of it, making sense of anything's a mammoth task, and for Len, Terry, and Einstein, time is running out.