Nell Valenti is settling into her role of transforming the Villa Orlandini into a superb farm-to-table cooking school, and the time has finally come for a full taste test run. But when Chef Orlandini prepares to reveal his top secret marinara recipe for the first time to a group of American gastro-tourists, Nell realizes she might have bitten off more than she can chew.

Nell begins to suspect that one of the tourists is actually a private detective sent to spy on her by her overprotective father, and the fussy foodies are noisy and disrespectful from the very start of the Marinara Mysteriosa workshop. Even worse, when one visitor appears to be poisoned by the famous marinara recipe, Nell will have to work fast to uncover a killer and keep a lid on bad press before her fresh start is spoiled for good.