The Mystery of the Missing Capybara

In one small town, life was quite dull. No events had disturbed its peaceful, mirrored surface like that of a forest lake for a long time. But what is this? Suddenly, bright posters appeared everywhere inviting people to the local zoo, where an exotic animal - a capybara - had been brought the day before. But on the designated day, there was no capybara... no capybara... no capybara... oh, capybara... to be found. Where did the exotic guest go? Where to search for it? Classmates Marik and Alisa take on the case, and they enlist the help of the little son of the local police officer, Slavik. But none of this trio knows what the mysterious animal looks like... So, the adventures begin!