A case at last

~~JOHNLOCK~~
***POSIBLE SMUT WARNING***
Sherlock is bored and high as a plane. When a case from Lestrade is almost immediately echoed by Mycroft Holmes, Sherlock gladly accepted the case.
But is there more to it than the brothers, John Watson and Lestrade could tell? And can Sherlock, even a caffeinated, high Sherlock, solve this one?