Slade investigates a slew of mysterious accidents occurring on a freight line that is jeopardising the contractor's deal. The biggest cient of a freight line refuses to sign a new contract unless the owner can guarantee safe delivery of the client's ore for two weeks, Slade is hired to assure delivery.

A tall blond Swede runs from an attack by two Indians. Gunnar is a carpenter looking for work and Slade has been summoned to Concho because someone has locked up the carpentry trade there.