I liked this episode, as it gives the viewer a chance to see Tuvok playing mother to a group of children! It's kind of cute.
The show begins with a shuttle crashing onto a moon. The usual 'red shirt' is killed--leaving Tuvok to try to figure a way off the place. However, he's surprised when he discovers several children running about the place. According to the kids, the adults were killed when their shuttle crashed. So, Tuvok tries to work on fixing the ship while trying to ignore the kids--as they annoy him repeatedly. Surprisingly, he seems pretty chill with this--and is a surprisingly nice, albeit Vulcan, surrogate mother. However, soon the kids start disappearing and they say it's some sort of monster that's eating them. What's really happening?! I really don't want to describe the plot any more, as it would reveal the mystery.
Overall, this episode is creative and charming. Even the downbeat ending manages to charm. Well worth seeing.