"Alchemy" is a pseudo-science that attempts to create gold from various combinations. One experiment brings to life creatures called "Chemies," which are stored in "Ride Chemie Cards" until accidentally released into the wild. Ichinose Hotaro is entrusted with the Gotcha Driver to recollect the Chemies. If resonated with a good heart, Hotaro can fuse with them to become Kamen Rider Gotchard. However, Chemies influenced by human malice can turn into monsters called Malgam. This story explores the nature of good and evil as Hotaro tries to collect them all and prevent the world's destruction. (Source: MyDramaList)