Coincidental

Two extraordinary siblings from Earth, in their late teens, find a dying man in a cave by mere coincidence. Despite the incident, their life seems to go back to normal for a while. But they already opened the door to knowledge (and problems) that have nothing to do with them, or even with their world.   They could look the other way, but decide to try and help instead. As well as trying to stop a plot against the most peaceful world known, Mirtala and Decklan do some alien tourism, make (sometimes unreliable) friends, and push their own limits.