Holmes and Watson investigate a bank break-in that resulted in nothing stolen, but strange graffiti left behind. The case leads to the discovery of a dead banker inside his locked flat that the police, though not Holmes, suspect was a suicide.
A modern-day Sherlock Holmes investigates cases. In the opener, Holmes is introduced to John Watson, an Afghanistan War vet, who becomes his flatmate. The pair then probe some improbable suicides that stump Scotland Yard.