If you go out for a walk, you're likely to come across many different kinds of plants and flowers. Some immediately stand out by virtue of the fact that they have bright colours, whereas others will pass unnoticed - particularly in the winter months. However, inside each plant could lie the power to take or save a life. Throughout history plants have been used as medicines and weapons their secret abilities invisible to muggles. From 'witches brews' to modern magical medicine, take a journey into this mysterious world...