Five kids follow mysterious clues as they search for their missing foster parents in this story based in Amsterdam. Will the children be able to find a light at the end of the tunnel they are travelling in? The story is set in Amsterdam. When their foster parents Erik and Kate Hunter go missing, five children Simone, Sophie, Tim, Jennie and Jerry set off in search of them with only a handful of clues to guide them. Will the children be able to find a light at the end of the tunnel they are travelling in?, Max, the newest addition to the Hunter family, must team up with his siblings Anika, Sal, Tess, and Daniel to find his foster parents Erik and Kate after they disappear mysteriously one night., Five kids follow mysterious clues as they search for their missing foster parents.