Grey and Eddie are dispatched to Switzerland where an extortionist is threatenig a prestigious hotel chain. He is demanding millions of dollars or he'll set off a bomb, leaving the Lime Street investigators racing against the clock to track him down.

Grey is in England with his daughters on vacation when a train disappears on it's last run before being placed into a museum. He and Eddie are assigned the case and soon turn up evidence that leads all the way back to a military payroll robbery that occured decades earlier aboard the same train.

In Amsterdam, a fortune in jewels are stolen from the high-tech safe of a broker. Grey and Eddie fly in to track down the culprit and end up suspecting two hick sisters from Arkansas who claim to be on vacation.