A girl named Raegan has a brother that just happens to be a little bit famous. You know Shawn Mendes. Yes... the Shawn Mendes. well he has this friend named Taylor Caniff and he has a tiny crush on Raegan. But after they watch a movie and he posts a vine of them cuddling everything goes wrong. she falls and hits her head and forgets everything. so I guess there is some flaws of Being Shawn Mendes Sister.