The Hardy Boys stand over Nancy Drew’s grave. The beloved teen detective, who has survived countless scrapes, cliffhangers and close calls, is dead — or so it seems — killed while pursuing a high-stakes investigation of organized crime. And it’s up to the Hardy Boys to solve the mystery of her murder.

What a way to celebrate the 90th anniversary of an unstoppable female hero.

The forthcoming comic book series “Nancy Drew & the Hardy Boys: The Death of Nancy Drew!” was intended to commemorate the publication in April 1930 of the first Nancy Drew book by putting a noirish spin on the classic tale of the roadster-driving, truth-seeking sleuth from River Heights.

But the possibility that Nancy — whose pluck and valor have helped her triumph over villains since the Great Depression — was murdered infuriated some of her passionate fans. It also sent her name trending on Twitter on Friday.

“I’m very surprised” by the blowback, said Anthony Del Col, who wrote the series, which is to be published by Dynamite Entertainment in April.