Once partners, Paul Sr. and his son Paul Jr. are now fierce competitors at contending motorcycle shops. This series captures the renewed rivalry as Paul Sr. continues to build world famous custom bikes at OCC, while Jr. opens up Paul Jr. Designs - his startup shop located across the street from OCC's original site. And the location isn't the only rub - Jr. heats-up the competition by bringing back former OCC employees including his brother Mikey, Vinnie DiMartino, Robert 'Nub' Colard and Joe Puliafico. In the battle between old and new, the father-son duo vie to see who can produce the most innovative choppers - with Sr. focusing on cutting-edge technology while Jr. taps into OCC's roots, building more traditional creations.