One of the chemistry labs have been closed for a few weeks. The reason given by the faculty was that they needed to clean it out properly in preparation for a full renovation. But there hadn't been any signs of actual cleaning going on and there are strange fluid noises coming from inside from time to time. Mini was convinced that it's an alien base in there and others have seen a strange pulsating, green shape through a hole in the curtains of a window.

Mystery Hunters Mini, Ell and Meyumi checked what the faculty was hiding in the chem lab...