How do you solve a case where the death occurred twenty storey high inside a locked room where the only ways of escape are a window that leads to a fall straight down to the ground with no ledges or fire-escapes, and a door that was locked from the inside?

How do you do it when you don't even know how the victim was killed?

1st in the series of cases solved by Adrian.

This is my very first detective story that I wrote in 2012. I had published this earlier here at Penana but had removed it. So, here it is again.

The story is 6 chapters long and already completed. I'll upload a chapter a day for the next 5 days. Hope you readers like it. :)