Despite being expelled from school at 15, Steven Bartlett runs one of the biggest social media marketing companies in the world, turning over millions of pounds a year. Now he goes undercover at Litherland, a cash-strapped school in Liverpool. During his six weeks, Steven meets Eloise, whose casual attitude hides a difficult past, and Ste, who dreams of becoming a millionaire. Steven also wants to use his own experience to help improve the mental health of staff and students, but how will headteacher Mr Rodgers respond to the newcomer's ideas?