Ever since Halibut Cove's popular eatery, The Chowder House, started serving matriarch Maggie Holbrook's famous clam chowder it's been in high demand. Cooked up at the restaurant by Maggie's ambitious nineteen-year-old granddaughter, Audrey, the dish even has a regular nightly customer, retiree Chips Hogan . . . until one fateful Sunday night.

After serving Chips his chowder, Audrey rushes off to Maggie's hilltop home for the weekly family dinner with the rest of the Holbrooks—her three uncles, and her mom, Jill. But before the meal's end, Jill, a police chief, gets an alarming call. Chips has been found in the street—dead. Jill races out to investigate . . . and is shocked to learn Chips's chowder was poisoned.

When a Chowder House server recalls seeing local diner cook Waldo Duggan in the alley that same evening, he becomes a suspect. And when it's uncovered that Waldo bitterly believed the Holbrooks stole the lucrative chowder recipe from the Duggans in the 1930s, he's only further implicated. Despite everything, Maggie can't believe Waldo would murder anyone. For fair-minded Maggie, to keep an innocent man out of jail, and to ease Audrey's guilt over serving the chowder, there's no choice but to team up to crime solve. Soon grandmother and granddaughter are immersed in a stew of rivalries, long held feuds, and looming threats.