Inspector Joseph French faces his most perplexing case yet when a young cinema box office clerk disappears after confiding her fears to Scotland Yard. As French investigates, he uncovers a sinister pattern of missing girls and suspicious deaths stretching back months. The clues point to a mysterious criminal gang operating an elaborate scheme, but their motives remain elusive. With time running out to save the latest victim, French must unravel the gang's ingenious methods and track them to their lair.

Filled with meticulous detective work and surprising twists, this gripping mystery showcases Freeman Wills Crofts' talent for intricate plotting and logical deduction. A classic whodunit that will keep readers guessing until the very end!