This article explores the growth of organised crime within the Vietnamese community with particular reference to the cultivation of cannabis, money laundering and the smuggling or trafficking of children. The article begins by exploring the history and diversity of the ‘Vietnamese community’ in the United Kingdom and the role of Vietnamese culture in shaping their criminal enterprises. It then draws on research involving two sets of qualitative data: one set is based on 45 interviews with law enforcement personnel based in Vietnam and the United Kingdom as well as with key stakeholders in the Vietnamese community; the other set is based on structured questionnaires issued to 34 Vietnamese residents in Britain, 24 of whom are here illegally. It examines the relationship between illegal immigration of Vietnamese citizens to Britain and the urban cultivation of cannabis, in what has become known as ‘cannabis factories’, and the laundering of the profits abroad to Vietnam. After exposing the logistics of Vietnamese illegal immigration into Britain, the article concludes that those involved in cannabis cultivation, money laundering and people smuggling are primarily motivated by profit rather than ‘lifestyle’ concerns, and operate within what theorists of organised crime refer to as the ‘mono-ethnic criminal network’.