Miss Daphne Beekman is a mystery writer by day, inquiry agent by night. Known for her ability to puzzle out plots, she prefers working behind the scenes for the Bleecker Street Inquiry Agency, staying well away from danger. However, Daphne soon finds herself in the thick of an attempted murder case she's determined to solve.

Mr. Herman Henderson is also a mystery writer, but unlike the dashing heroes he pens, he lives a quiet life, determined to avoid the fate of his adventurous parents, who perished on an expedition when he was a child. But when he experiences numerous attempts on his life, he seeks out the services of the eccentric Bleecker Street Inquiry Agency to uncover the culprit. All too soon, Herman finds himself stepping out of the safe haven of his world and into an adventure he never imagined.

As the list of suspects grows and sinister plots are directed Daphne's way as well, Herman and Daphne must determine who they can trust and if they can risk the greatest adventure of all: love.