After surviving a plane crash, The Six Macs find themselves in a snowy Himalayan wilderness where they discover the village of a secretive mountain tribe who show them a way to a temple run by Kung Fu Nuns.

The nuns tell them that the mountain tribe must be kept secret and can tell no one they have seen them. They also told them that while they were mending the tribe's precious Bell of Souls, it was stolen from them by English travellers.

After a dangerous journey to base camp the Six Macs find the bell and begin their adventure to return it to the hidden tribe.