High Tide at Midnight (Trese, #6)

The unceasing rain muffles the screams of the victims being pulled down, down into the murky flood waters.
In the places too high to be reached by the flood, the party continues for the privileged, who indulge in a new designer drug which grants them the supernatural abilities of enkanto and aswang.
These are the murders and mysteries Alexandra Trese needs to solve as the tide continues to rise at the stroke of midnight.