Sadie Kramer's friendly offer to deliver three boxes of gourmet Valentine truffles for her neighbor's chocolate shop, Cioccolato, backfires when she arrives to find the intended recipient deceased. Even more intriguing is the fact that the elegant heart-shaped gifts were ordered by three different men.

With the help of one detective and the hindrance of another, Sadie will search San Francisco from the prestigious financial district to a low-life bar, to iconic Fisherman's Wharf, looking for clues. With the help of her trusted sidekick Yorkie, Coco, will Sadie manage to find out "whodunnit" before the killer finds a way to stop her?