Leo And Sirius

Leo and Sirius are age-old enemies. In every three hundred years, malicious Sirius will exercise its evil power to turn human beings into werewolves. They would then go and hunt for blood to be used at the altar of Sirius. Righteous leader YIP LING SIU of the Sun Castle leads the search for the Leo-stone to subdue the evil power of the werewolf. He claims that the leader of Moon Castle, HA CHIN PANG, is the werewolf, and starts the pursuit against him. Horoscopes TIN HANG remains skeptical of the claim. Pursued by People, CHIN PANG sends away his daughter CHI-TSING. In the combat against LING',:'SIU, he falls down a cliff. TIN-HANG is attacked by mysterious agents, and is forced to go on a journey to evade the pursuits. CHI-TSING is rescued by a couple and is brought up by them in the Haunted Valley. Eighteen years passed. PAK-LUNG is taught by his father horoscopy. A meteor slides across the sky……

CHI TSING is taught martial art by a masked man. When the Leo-stone appears, CHI TSING is asked by him to set off and search for the stone.CHI TSING meets TIN HANG and PAK LUNG on the way. They see traces of werewolf and start investigation. Later on, they find out that it is YIP LING-SIU's daughter PING's impersonation. She wants to scare everyone off so that she could possess the stone for herself. The stone has earlier been taken by Craftsman LO CHIU. A trap has been set. TIN HANG sacrifices his life to rescue PAK LUNG, CHI TSING and YIP PING.YIP TSING hurries back to the Sun Castle to receive her aunt TSING FA and cousin TIT CHU. TSING FA has a wicked plan to usurp the Chieftain status from YIP LING SIU. She has YIP PING take some ageing poison. YIP PING ages quickly, but she refuses to yield the Chieftain plaque to her aunt. YIP LING SIU is invigorating himself in a closed Chamber.

Cousin TIT CHU leaves the castle angry with his mother's despiteful behavior. He meets TIN LUNG and CHI TSING and tells them everything. They hurry to the Sun Castle. After seeing YIP PING, they resolve to have CHI TSING go back to the Haunted Valley to get healing medicine. The couple that bring up CHI TSING is masters in medicine. Their medicine is grabbed by the lord of the Valley NGO KONG, who threatens to kill CHI TSING. PAK LUNG arrives and starts a fight with NGO. He-succeeds in getting back the medicine.

YIP PING recovers from her ageing disease with the medicine from PAKLUNG and CHI TSING. YIP then summons her people to pursue her aunt CHING FA and TIT CHU. The werewolf appears and attacks the mother and son. TIT CHU is poisoned and becomes a werewolf at full moons. LING SIU knights PAK LUNG, and sends-him to seek for the Leo-stone with PING. Out of jealousy, PING accuses CHI TSING an evil agent coming from the notorious Haunted Valley. CHI TSING leaves the castle in great anger. Back in the Haunted Valley, CHI TSING is forced by the master to produce the youth potion. TSING FA comes to the Haunted Valley to seek help from the couple who are medical experts.

PAK LUNG and YIP PING pay a visit to LO CHIU to ask for the Leo-stone. They have to surmount ordeals and traps before LO would receive them. At this time, CHI TSING has brought along TSING FA to seek from LO some herbal medicine grown out of the Leo-stone to cure TIT CHU's ailment. CHI TSING wires the favor of LO and secures the herbal medicine As TSING FA greedily seeks to grab the Leo-stone for herself, a strange phenomenon happens. Three stars align and the Leo-stone radiates with glaring lights that scares away TSING FA. PAK LUNG and the others secure the Leo-stone and take it back to the Sun Castle. CHI TSING is instructed by her master to steal the Leo- stone from the castle.

TIT CHU falls down a cliff and is rescued by a woman ninja SHUM TIN MUI. They get to know each other's history and quickly fall in love. CHI TSING is caught by PAK LUNG and YIP PING of stealing the Leo-stone. She leaves them with great shame. CHI TSING returns to the Haunted Valley. She is voted the new leader of the valley. However, she remains depressed as her thoughts are still with PAK LUNG. PAK LUNG and YIP PING return to the Sun Castle and discover that the Leo-stone is counterfeit. They suspect LO CHIU has the real stone and decides to go to the Haunted Valley to get it.