Hand aufs Herz is a German television soap opera and premiered on October 4, 2010 on the private broadcasting station Sat.1. It got canceled in June 2011, announcing the series finale for September 5, 2011. However that changed when Sat.1 decided to drop the show from its line-up and sixx was announced to air the remaining episodes; with a one-hour series finale on September 2, 2011. The show focuses around a fictional high school in Cologne and tackles with young love, a marriage crisis, a mysterious disappearance, schemes and competition fights, coming out, drug abuse, career chances and forbidden feelings. Hand aufs Herz also introduces something completely new to the genre of a soap opera by including music and dance as one of the main elements. It has been compared to the successful American television show a hit TV show, Glee and the High School Musical franchise. Even though it started out as a musical series, the show shifts its stories from that plot even though it remains a part of the series. Hand aufs Herz started two weeks after the failed daily drama Eine wie keine aired its final episode due to low ratings. The show is in direct competition with the long-running soap opera Verbotene Liebe and is starring with Vanessa Jung and Andreas Jancke two of its former stars.

After Kati, Hanna and Mila first experiences with guys, it is now necessary to cultivate those relations. The jealous Mila thinks that her friend Markus, would cheat on her with Vanessa. Kati, who is actually together with Tobi, finds that Robert, whom she met during a shooting, more than just cool. Only with Hanna everything seems to work perfectly. Branko is a real gentleman and does everything for her musical career - but not entirely unselfishly, as soon turns out. Problems therefore pre-programmed with the girlfriends and their new conquests!

Teenage best friends Mila, Hanna and Kati play matchmaker to their teachers while helping each other through their own budding romances.