Ever since Zane lost his duel to Aster, his pro career has gone downhill. After losing another simple duel and being dropped by his sponsorship, he was confronted by a businessman named Mr. Shroud. He introduced the concept of underground dueling to get his career back. Zane is led to a cage in a restaurant and forced to duel Mad Dog, a duelist who was considered to be the best in underground dueling. Zane dueled with a shock collar around his neck so when he lost life points he would get hit with electricity. Zane is losing until he realizes he's always paid too much respect to his opponents. Upon this realization, he finally lets his malicious side loose and beats Mad Dog without mercy using a new monster, Chimeratech Overdragon. After the duel, Zane starts to build his career back up, beating his opponents without mercy or respect.