at first it seemed to be at a frequency almost too low for human hearing , but it grew louder and louder . he slammed his visor up , taking a gasp of fresh air to clear his mind . she looked familiar , but at first he could not place her . and within five minutes he was ready to go out on a mission to make sure . `` i 'm in , '' i say in spite of the fact i should n't be anywhere near ace waterman , let alone perched on a boulder overlooking the lake . 