The Alchemical Universe is under threat, and Mila and her friends need to get to the depth of the Eternal Fire in order to ruin The Operator's evil plans. But Operator Zero won't give in, he will use all of his resources to stop Mila from saving the multiverse.

Mila and Vinícius get to the greenhouse through the Copper Tunnel. Operator Zero catches them by locating Mila with a device designed to scan the multiverse and reveals to Mila that their goal isn't to destroy just the Alchemical Universe, but all of the multiverse. Mila needs information that only Elis has.

While Mila, Pierre, and Juliana are asleep, Vinícius finds the Copper Tunnel, but he cannot find the door to access it. Mila thinks that Mila II, from that Universe, might know where the door is and asks Pierre to establish communication. Meanwhile, in Universe I, Mila II and Elis X are having fun.

The group of friends is shocked by what they hear: the whole universe is in danger! Without losing her cool, Mila heads the group and asks for help from the only person who can do something. Although Elis is in danger, she tells them to flee to the Copper Tunnel. Now they need to think of a safe way to get there.

Mila is forced to tell Juliana and Vinícius that she doesn’t belong in that universe and her mother is in danger. Mila, Pierre, Vinícius, and Juliana find the hiding spot of The Operators and discover the true intentions of the dangerous group.

The plan to get back their things works but Mila and Juliana become momentarily trapped and discover that Veronica has been kidnapped. Mila finally manages to talk to Elis, who tells her that she is in danger in this universe and must return home immediately.

Mila finds Pierre, someone she knows from her own Universe. Pierre's consciousness has been segmented across the multiverse. She also finds different versions of old friends, Juliana and Vinícius. In order to go back to normal, Mila will have to recover a key element.

Mila and her mother Elis have a heated argument, which is interrupted by the arrival of The Operators. Elis flees, but not without giving Mila her peculiar birthday present: a device that allows her to travel through the multiverse.