We've all woken up on the wrong side of the bed... but have you ever woken up actually stuck to the bed? Fifth grader Masha Sweet wakes one morning to discover that her evil-genius little sister, Sunny, has glued plastic flowers onto Masha's head. When it seems that nothing will get the flowers out, Masha's mother lets her stay home alone for the day—she can't leave the house like this! But when her neighbor, Mrs. Song, has a bike accident, Masha has to rush to the rescue and soon finds herself (and her giant flower bouquet headpiece) at the hospital with an unlikely cast of characters.
What starts as a "my sister is a pest!" tale, quickly evolves into a much bigger, zanier adventure. But as the events snowball, Masha keeps one thing in mind: Sunny Sweet is going to be so sorry!