Walking to the shops one day, fifty-year-old Eugene Wren discovers an envelope on the street bulging with cash. A man plagued by a shameful addiction—and his own good intentions—Wren hatches a plan to find the money’s rightful owner. Instead of going to the police, or taking the cash for himself, he prints a notice and posts it around Portobello Road. This ill-conceived act creates a chain of events that links Wren to other Londoners—people afflicted with their own obsessions and despairs. As these volatile characters come into Wren’s life—and the life of his trusting fiancée—the consequences will change them all.