Cos'è successo a Imogen Frost?

After a tragic helicopter accident that claimed the lives of his parents, Imogen, the sole heir to a considerable fortune, vanishes without a trace. Having gone out for a simple run, he never returned, leaving behind a trail of unanswered questions. What happened to him? Is he still alive? And if so, where is he? Will Julia be able to solve the mystery and bring the young heir back home?