When Bobby Jones goes to retrieve his wayward golf ball at the bottom of a cliff, he little expects that he will find a dying man there. With his last breath the man gasps, “Why didn’t they ask Evans?” Looking for a handkerchief in the man’s pocket Bobby pulls out a photograph of an attractive young woman.

Intrigued by the question and the photograph Bobby and his vivacious friend Frankie Derwent set out to solve the mystery—putting their own lives in great danger along the way.

1 The Accident

2 Concerning Fathers

3 A Railway Journey

4 The Inquest

5 Mr and Mrs Cayman

6 End of a Picnic

7 An Escape from Death

8 Riddle of a Photograph

9 Concerning Mr Bassington-ffrench

10 Preparations for an Accident

11 The Accident Happens

12 In the Enemy's Camp

13 Alan Carstairs

14 Dr Nicholson

15 A Discovery

16 Bobby Becomes a Solicitor

17 Mrs Rivington Talks

18 The Girl of the Photograph

19 A Council of Three

20 Council of Two

21 Roger Answers a Question

22 Another Victim

23 Moira Disappears

24 On the Track of the Caymans

25 Mr Spragge Talks

26 Nocturnal Adventure

27 'My Brother Was Murdered'

28 At the Eleventh Hour

29 Badger's Story

30 Escape

31 Frankie Asks a Question

32 Evans

33 Sensation in the Orient Cafe

34 Letter from South America

35 News from the Vicarage