Tommy and Tuppence Beresford are restless for adventure, so when they are asked to take over Blunt's International Detective Agency, they leap at the chance. Their first case is a success - the triumphant recovery of a pink pearl. Other cases soon follows: a stabbing on Sunningdale golf course; cryptic messages in the personal columns of newspapers; and even a box of poisoned chocolates. But can they live up to their slogan, 'Any case solved in 24...

"While visiting Tommy's Aunt Ada at Sunny Ridge Nursing Home, Tuppence encounters some odd residents including Mrs. Lancaster who mystifies her with talk about "your poor child" and "something behind the fireplace". When Aunt Ada dies a few weeks later, she leaves Tommy and Tuppence a painting featuring a house, which Tuppence is sure she has seen before. This realization leads her on a dangerous adventure involving a missing tombstone, diamond smuggling...

"It is World War II, and while the RAF struggles to keep the Luftwaffe at bay, Britain faces an even more sinister threat from 'the enemy within'--Nazis posing as ordinary citizens. With pressure mounting, the intelligence service appoints two unlikely spies, Tommy and Tuppence Beresford. Their mission: to seek out a man and a woman from among the colorful guests at Sans Souci, a seaside hotel. But this assignment is no stroll along the promenade--N...