SENIOR VS. JUNIOR follows father and son as they go head-to-head building bikes in competing businesses. While Paul Sr. continues building his world famous custom bikes at Orange County Choppers, Jr. opens up his own shop, Paul Jr. Designs. Once partners, the two Teutuls are now competitors in the world of custom bike building. Not only will the rivalry be intense in business, but the personal relationship between father and son will be tested as never before.