Dashi, Tweak, and Peso escort a swarm of Monarch butterflies as they migrate south for the winter, and have to think fast when the insects' traditional route is intercepted by a tornado!

The Octonauts meet strong scaly foot snails and enlist them in trying to help save the Octo-Lab from falling into a crevice. The Octonauts head to the Yangtze River to help Min the Mapmaker ...