Knowing about Kei's mean behaviours, Chu persuades his father to deal with him. Still relying on Kei to search the 'Cave with Four Dragons Converging', Tim Choi is not willing to conflict with him. Among things left behind by Tin, Kau discovers the 'Eight Fairies Battle Formation', a product fung shui learning which may overcome Kei. Kau then arranges the battle formation with the help of Man and others. Can Kau defeat Kei? How is the eternal triangle which involves Ying, Kau and Man, be resolved?