Dan Williams is unable to prevent a young woman high on drugs (referred to as speed but which have the properties of LSD) from jumping off a cliff to her death. The incident puts Five-O on the trail of Professor David Stone, who was kicked out of "a Mainland university" for enticing students into using drugs. As McGarrett is building his case, the death woman's father confronts Stone and forces him to take a large dosage of the drug. Stone ends up on the same cliff and now McGarrett attempts to save his life. Written by
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Professor David Stone
There are no teachers in my profession, Mr. McGarrett... Only guides.