Superstar a capella group Pentatonix is struggling to find inspiration for their annual holiday album, and the clock is ticking. To make matters worse, their well-intentioned but misguided manager mistakenly locks them in a magic mailroom. But with the help of some Disney magic, we're soon on a whirlwind tour around the world, discovering holiday traditions and inspiration from Pentatonix fans all around the globe: from Tokyo to Grenada, Ghana to Mexico and Iceland. The fun-filled journey leads the group to realize that wherever we find ourselves, the holidays offer the perfect opportunity to discover how much we have in common and that it really is a small world after all.