Ten-Second Staircase (Bryant and May‪)‬

An artist is found dead in a gallery with locked doors and windows. A television presenter is struck by lightning while indoors. Two seemingly impossible crimes that only Arthur Bryant and John May of the Met's Peculiar Crimes Unit might be able to solve. But Bryant has lost his nerve and May is fighting to keep the unit from closure. Worse still, an unsolved mystery from the past has returned to haunt them...