While convalescing in New Zealand, British aristocrat Sir Charles Pemberton schemes to build a thermal spa in the town of Wainamu, but conflict ensues as the spa's planned location is on Māori land. The action is seen through the eyes of youngsters: hotelier’s son Tom, and Pemberton’s granddaughter Sarah Jane; who - alongside an erupting volcano - will ultimately teach Sir Charles a lesson about colonial hubris.

Trouble with the local butcher Doomy Dwyer and the arrival of some aristocratic guests at the Albion Hotel add up to a very depressing day for Tom Gregory.

Tom has problems getting along with Sarah Jane (who he calls Miss Prim).

The men of Wainamu are encouraged to enlist in the army to fight in the Boer War.

Things go wrong for Tom Gregory with his aristocratic foes. Even a last ditch attempt to improve matters backfires.

There appears to be a truce between the Tom Gregory gang and the English aristocrat.

The children are on the trail of Doomy Dwyer's illegal still.

There's conflict in Wainamu over the location of a secret still/

The arrival of two strangers in the town leads to the disappearance of one of the townsfolk.

The mystery of Doomy Dwyer's disappearance deepens and strange occurrences at the lakeside bring unease to the town.

Christopher makes some strange discoveries, while success seems to be within the grasp of the gang.

Sara sees a ghostly canoe on the lake, and news of the victory in Mafeking reaches Wainamu.

The town of Wainamu seems to be in great danger as predictions are coming true.

The arrest of Doomy Dwyer and a volcanic eruption.