Once he had acquired a respectable nickname, Sos was sure he was destined for great things, but he did not expect them to happen in the way they did. Sitting in the classroom, during an English test, he suddenly found himself on his feet shouting, "Isn't anybody listening.' It was his voice, but he hadn't said it. And so began an exciting adventure for him and his friend Sandy as they attempt to free Will Naylor from the clutches of the strange Dr Maxwell.

The tragic death of a young student, Melissa Franklin, was a shogk to all those who knew her; the two teachers whose job it was to supervise the excursion; her friends and fellow students who felt some responsibility for the accident and Stephen Watson who could not understand why Melissa had suddenly dumped him. Though the death was declared an accident, there was still some suspicion that it may have been a suicide. Susan, Melissa's sister is determined to find out what was going on in her sister's life and what really happened that day.