Three groups of friends from different primary schools visit the National Museum of Scotland in Edinburgh at night. With no adults around, they are free to go on their own journeys of discovery. The museum contains a wide range of artefacts from every era of history. What objects will spark their imaginations? Will they be inspired, bored, amazed or confused? And although the kids are on their own, they are being watched by the museums' curators, who provide light-hearted commentary.What do the kids like? What do they find boring? Do the objects in the museum mean anything to them? How do they imagine the past? All these questions are answered, often in funny or unexpected ways. Can museums and the historical objects they contain inspire kids brought up in an age of tech? Are they still relevant in the 21st century?