When Juli wants to pick up her student ID card for her electrical engineering studies, her long-term-boyfriend Tossi breaks up with her because he thinks she's too emancipated. But give up her dreams because of this douchebag? Not with Juli Mörtlbauer.

Just as Juli's boyfriend is breaking up with her, this Braingirl starts her very own project! Get ready for the hottest lecture of the year.

Juli and study'n'chill-Maschbauer Lukas have a deal: She drags him through the semester and in return he helps her win back her ex - to drop him. But July quickly finds herself in a dilemma: nerdy owl or party girl?

Lukas' idea to market July as #tubraingirl on Insta is a big hit: Tossi Winter comes to the TU Munich. And Juli's plan to win him back is a complete success: they get very close again in the robot lab.

One cathode on its own is useless... July won the hackathon - but lost her friends. At least she still has Tossi, Juli thinks. But when she learns the real reason for his return, it all comes crashing down around her.