The story begins in 1789 in Congo, in Africa, where a tribe celebrates the marriage of Luena and Kamau. The natives, trapped and sold as slaves.

Raised by a kind Kaingang family, adventurous young schoolgirl Luz launches a quest with her firefly companion to learn the truth about her roots.

Luccas Neto, his sister Gi and their friends Vitória, Pedro and Jéssi had no idea what was to come on the school trip. When Luccas decides to invade the laboratory of the recently disappeared scientist Honório Flacksman, the group is sucked into a portal that takes them to another dimension – the City of Joy.