Loyola Boyle, a law student from Dublin, discovers he has made his girlfriend pregnant. Learning that she is only 15 and also that her dad is his dad's best client, he decides to scarper.

Loyola sets his sights initially on the USA and Boston in particular, later deciding to hitch-hike his way down to the hot spots and morenas in Mexico. On route he encounters a litany of comical characters and situations, not least finding himself embroiled in an ancient unfinished celtic dilemma. Amidst all this turmoil Loyola never fails to take advantage of the delectable delights on offer from "Boys Town" or some other honky-tonk hacienda heaven.