I can't do this anymore!

Mackenzie Ziegler is a dancer at Aldc her sister Maddie is a few years older than her and is the star of the team well in miss Abby's eyes anyway . Mackenzie has always had to live with Maddie being the amazing sister and Mackenzie just being there never being able to do any thing right . The fact that Melissa ( there mom ) favourites maddie makes it 1000 times worse . Mackenzie can't handle this she doesn't know what to do she starts to feel lost and depressed.