A young woman walks into her brother's apartment, stabs him in the chest with a pair of shears, and jumps off the balcony. It looks like a regular murder/suicide, but people who knew the girl, keep repeating she wouldn't hurt her brother, so it's up to Lieutenant Eve Dallas to figure out what happened.
This is one of those short stories/novellas, you wish were turned into a full-length novel. There was just so much there to explore, from the Alice in Wonderland theme to the possibility of mind-control through drugs and suggestion.
Add to it a deliciously mad villain and you get quite a potent combination.
The way it played out, on the other hand, came across as slightly rushed and pretty lucky investigation-wise. Still, a pretty solid story with the always solid cast.