Watch Online Free on Watchseries. The Momonsters are spending their first vacation in a campsite in the middle of the forest! Exploring the nature, doing outdoor activities, telling stories around a campfire… Any child’s dream vacation. However, over their first night there, they find the diary of a previous camper stating that there’s a treasure hidden in the woods. “Super cool!” but it’s guarded by a scary ghost. “Not so cool…”