High above the ground, in a secret clubhouse nestled in a sycamore tree, five friends uncover a magical doorway to the past. Together, Ashley, Emma, Keith, Aaron, and Harry-better known as the Tree House Club-set off on a mission to discover the truth behind the history they thought they knew. Their latest journey takes them to the island of Guanahani in 1492, on the eve of Christopher Columbus's arrival. Welcomed with open arms by the kind and generous Taino Lukku-Cairo tribe, the friends soon realize that Columbus's voyage was far from heroic. As they witness his greed and the growing mistreatment of the Taino people, the Tree House Club is faced with a dangerous question: What happens when standing up for what's right puts your own life at risk? As tensions rise and danger closes in, the children must rely on their courage, their friendship, and the power of the treehouse to get back home-before it's too late.