Ready to mix up your spring TV lineup? Disney Channel is bringing us a fresh coming-of-age drama with the soon-to-be hit, Andi Mack. The show stars Peyton Elizabeth Lee and follows the story of a young girl trying to navigate the often confusing world of family and friends. As the story begins, Andi’s life is about to be turned upside down when her older, beautiful and all-around cooler sister Bex returns home.

But what is it about this show that will keep you totally hooked? The premiere on April 7 is going to hit viewers with a major plot twist, so prepare yourselves for a seriously shocking bomb to drop in the first episode. Warning: major spoilers ahead, so read ahead at your own risk…

On her 13th birthday, Andi receives news that will turn her world upside down. Her sister Bex reveals that she is actually Andi’s mother, which means Andi’s mom is actually her grandmother! Wow…talk about a major twist. See Andi react to the shocking news in the premiere episode, streaming now on demand and airing on Disney Channel April 7. Plus, go behind the scenes of Andi Mack with the cast in the video above, and see why this is the can’t-miss show of the spring!