Aya is a worrier. During the day she is as happy as can be, but when it gets dark, when it’s time for bed, that’s when her troubles begin. The curtain turns into a scary witch, the spider on the ceiling into an evil alien and the dress on her chair into a spooky ghost. Worst of all, the box where she posts all her worries is getting bigger. What terrible thing could be growing inside and what can Aya do about it?