STORY is about showing the added value storage can bring for a flexible, secure and sustainable energy system. The demonstrations therefore compose the key activity on which all further analysis builds. Each of the demonstrations brings a different technology, context or business case. Together they provide a profound basis to feed into the large scale impact analysis. In order to research and demonstrate the impact of introducing more storage capacity into the grid, 18 institutions from 8 countries have teamed up to create STORY, which is funded by the Horizon 2020 Framework Programme for Research and Innovation of the European Union.