Australian Kenny Smyth (Shane Jacobson) has possibly one of the most thankless and off-putting occupations imaginable: He's a plumber who specializes in delivering and maintaining portable toilets to well-populated events. Mockumentary cameras follow Smyth as he juggles his family life with his excrement-soaked travails and eventually works his way to the highlight of his career -- a visit to the International Pumper and Cleaner Expo in Nashville, Tenn., a gathering for renowned plumbing pros.