Queen Mkabayi Zulu Kingmaker

Twins, Kaya and Vusi time travel to the 18th Century Zulu Kingdom, in present-day South Africa. The king is dead and powerful Ndwandwe warriors fight to take over the Zulu Kingdom. How much blood will Queen Mkabayi need to spill to impose a suitable Zulu king? Will the twins survive the war and make it back home?