The drainage system on the covered walkway between the car park and the building's side entrance chose a Wednesday morning in November to fail completely and without warning. Ava discovered this at seven forty when she came through the car park exit and found the overhead guttering overwhelmed and pouring down in solid sheets across the entire width of the walkway that was supposed to get her to the building dry. She stood at the edge of it and assessed the situation with the practical attention she brought to problems, which told her that she had three options. She could go back through the car park and around to the front entrance, which was eight minutes in the rain. She could wait, which was not useful because the rain showed no signs of stopping and she had a seven fifty she needed t

