Beneath the Nelson Mandela Boulevard flyover on Cape Town's foreshore live a community of stowaways, young Tanzanian men from the slums of Dar es Salaam. When journalist Sean Christie meets Adam Bashili, he comes to know the extraordinary world of the Beachboys, a multi-port, fourth-generation subculture that lives to stow away and stows away to survive. But as Sean starts to accompany the Beachboys on trips around their everyday Cape Town, he becomes more than a casual observer, serving as sometime moneylender, driver, confidant and scribe, and eventually joining Adam on an unprecedented tour of Dar es Salaam's underworld and a reckless run down Africa's east coast. Under Nelson Mandela Boulevard remaps both city and continent, introducing us to the places and people we so frequently overlook.