The Legend & Adventures of Tae & Kwon. A Time travel martial art adventure

Englishman Jim Scott and Chinese pal Sam Lo are martial art experts. Sam has an old map showing the location of a cave in Mongolia. In it are supposed to be life-size drawings of people practising unarmed combat. It also mentions many pages of writings and drawings on vellum and a small gold image of a Snow Leopard.
After years of fruitless searches Scott and Lo stare at a car-sized chunk of vertical rock covering the cave entrance. After levering it away they enter the cave labyrinths and stare in wonder aided by the glow from their bracken torch at the hundreds of drawings
A deafening thunder-clap, blinding lightning flashes followed by the growling roar of Snow Leopard, has them dashing for the entrance as the cave shakes violently. Recovering they re-enter as two cave figures rocket from the wall, they are Prince Kwon and sister Princess Tae, young ancestors from an ancient dynasty. After bowing they are sucked down a time tunnel and vanish. Their exit is quickly followed by twins Kim and Tan Soo from an enemy rival dynasty emerging from the walls, they too are sucked down this tunnel, and an old man called Ling also disappears
Scott and Lo know they had to find the cave and the scribe’s drawings before the new millennium is struck on the last stroke of midnight in the year 1999, otherwise, the cave will be lost forever. They do not find the scrolls or a solid gold car-size image of a Snow Leopard as they too are sucked down the time tunnel.
All five land in Seoul South Korea home of Tae Kwon Do.
Tae and Kwon were charged to get the scribe’s work into safe hands; no one dreamed it would happen 3,000 years later. Fortunately not only are Scott and Lo on their side, but Ling, a master of disguise is a wise martial art master who taught Tae and Kwon as children The Soo twins should not have emerged from the cave, and now pose the biggest threat, they know of the scribe’s work. And want it at any cost. There is a Tae Kwon Do master, a tyrant on the Tae Kwon Do governing board who has an ear for anything crooked so when he joins the Soos for his own benefit, then the martial art world could change forever, as the many splinter art groups are in it for profit only. The scribe’s ancient work is priceless, and every country where martial art is practised wants them. Tae and Kwon need all the help they can muster. The world Tae Kwon Do championships are due, in the final Princess just manages to beat Tan Soo in a breathtaking spinning board breaking jumping kick feat. Immediately Tae and Kwon are tumbling down the shortcut, destination unknown.
So ends their 1st adventure.
In their 2nd, they land on a snow-covered mountain. Ling is there they do not know his background yet. They’ve turned to their beginnings Ling sees Snow Leopard Tracks. Scott and Lo are dumped miles away. Fortunately, Sam-a Wantung Shaolin monk is up on martial art history. Tae and Kwon are not only skilled in all martial arts, but also multi-lingual.
Next, they land in Japan to face more dastardly foes after the writings.