In the quaint, rain-soaked town of Willowbrook, an unlikely duo forms a detective agency like no other. Grib, a clever goblin with a knack for problem-solving and a mischievous sense of humor, teams up with Grandma Maggie, a witty and resourceful retired librarian, to tackle the town's most baffling mysteries.

The story kicks off on a stormy night, with Grandma Maggie seeking Grib's help to uncover the truth behind a series of strange symbols appearing around Willowbrook. Despite dismissive attitudes from the local police, who view these occurrences as mere pranks, Maggie and Grib sense something far more sinister at play—an ancient curse tied to the town's dark legends.

As they delve deeper into the mystery, their investigation takes them through the shadowy streets and hidden corners of Willowbrook. They uncover clues in old records and cryptic symbols, encountering both red herrings and dangerous adversaries. Their unique skills and perspectives—Grib's sharp eyes and magical gadgets, and Maggie's vast knowledge and intuition—prove invaluable as they piece together the puzzle.

With its blend of gritty, 1950s noir atmosphere, whimsical fantasy elements, and heartwarming themes of friendship and community, "The Goblin and the Grandma Detective Agency" offers readers a delightful and engaging mystery adventure.