The Murder After The Night Before By Katy Brent

Something bad happened last night. My best friend Posey is dead. The police think it was a tragic accident. I know she was murdered.
I’ve woken up with the hangover from hell, a stranger in my bed, and I’ve gone viral for the worst reasons.
There’s only one thing stopping me from dying of shame. I need to find a killer.
But after last night, I can’t remember a thing...