Nyx lives in Tasmania in the year 2093, where the oceans have become acidic and bushfires rage throughout the year. To express her frustration with the world, she leaves an angry and desperate message on her favorite tree. Seventy years in the past, Bea finds Nyx's note and replies. The mailbox tree becomes the link between the two girls across time. But when Nyx's world is on the brink of collapse, their friendship is put to the test, and a race against time begins: Can the past save the future?

An exciting climate thriller with a fantastic twist and a friendship that bridges the ages. The highly relevant topic of climate change is brought to life in this gripping novel.

An inspiring friendship story with a fantastic twist for readers aged 10 and up.