Twelve Chefs begin the journey of a lifetime in London, England. On The Course, the chefs are immersed in the local food culture as they race in a pub crawl to win the Exceptional Ingredient. The tension rises quickly for one team as they unsuccessfully try and navigate the confusing streets of London. For The Takeover, the teams are sent to Gastropubs where they serve up authentic dishes to the British diners. Celebrity Chef, Nigella Lawson, joins the locals in choosing a favorite restaurant. Nigella Lawson serves as local food expert.