While Tom and Johnny are on a husky safari in Finland, their half-sister Grainne stays behind to face the mother who abandoned her. But Tom and Johnny are too caught up in their adventure to think of home - until they find themselves lost in the snow, struggling to survive...

In 1880's Ireland, with the Land War raging and evictions and boycotting overturning everyday life, three children from very different background form a secret - and dangerous - alliance.

Sarah becomes involved in spying for Michael Collins during the War of Independence.