One night the unthinkable happens: Amy Rose is found shot to death. It's one of the most violent crimes the city has seen for a while, and to just a kid at that. No one knows who could have wanted Amy dead. With few leads, Sonic decides to take the law into his own hands and find out who killed Amy Rose.
Though Frenzy is a Sonic/Amy fanfic, it doesn't rely heavily on Sonic having romantic feelings for Amy. Instead it focuses more on finding the identity of Amy's murderer.
Frenzy provides examples of:
- Dead Man Writing: Amy knew she was being targeted so she left a message for Sonic in case she was murdered.
- Death of a Child: The plot starts with twelve-year old Amy being mysteriously killed.
- Death Fic: The story revolves around Amy being murdered.
- Even Evil Has Standards: Dr. Eggman isn't considered a suspect for this reason. Killing people isn't his thing.
- Funny Animal: They're referred to as "anthros".
- Improbable Age:
- Rouge and Shadow both work for G.U.N. despite their young ages (at least physically for Shadow).
- Eight year old Tails offers to help G.U.N. find out who killed Amy.
- Lions and Tigers and Humans... Oh, My!: Anthros live amongst humans, though they're less common than them.
- Mature Animal Story: The Funny Animal characters are targets of a Serial Killer.
- Minor Living Alone:
- As mentioned in canon, Amy has her own apartment to herself even at age twelve.
- One of the other victims is a sixteen year old deer anthro that lives by herself.
- Parental Abandonment: Implied with Amy. She lives by herself and her closest "relation" is Sonic.
- Serial Killer: The plot revolves around seemingly random people around the entire United Federation being killed in similar manners by a serial killer.