Tulip and his brother Rowan have left the simple comforts of their remote Scottish island with a plan: to grow succulent, organic vegetables in an idyllic market garden, and to open a restaurant serving these wholesome culinary delights to the busy sprawl of London. The world of fine dining seems impossibly competitive, until they discover a deliriously scrumptious new species of mushroom. The dish brings diners in droves, catapulting their small restaurant to success beyond their wildest dreams. Now, pressured by the demands of a hungry city, Tulip is desperate to crack the secret of their new ingredient's growth. But just how much will he sacrifice to feed his own insatiable ambition?