Told in alternating voices, twelve-year-old Sami, from a village along the Bay of Bengal, and fourteen-year-old Yuki, from Northern Canada, strive to protect their homes from the encroaching damage brought on by climate change.

"Mo, Leon, and a recovering Katelyn are on the move again, along with Amazon activist Alma, whose strange new powers are just developing. They've been tracking the movements of their longtime nemesis--businessman-turned-supervillain Jason Greenleaf--and this time they're determined to stay one step ahead of him. But as they race to uncover the meaning behind Jason's new friends The League and the mysterious new serum he is developing, the team must...