Written by Eric Borden, illustrated by Dave Mims and lettered by Spike O'Laochdha, Scrimshaw Volume 3 follows the crew of the Runaway Horse as they set sail for the West, undertaking a mission to repay their debt to the Tanto Corporation. 
 
In order to secretly make their way into the New Republic of Texas, the crew must enlist the help of Mariposa's sister, Salome, who sits at the head of the fearsome Playa Rojo Cartel. Salome agrees to help them cross a massive and treacherous desert, the Sonoran Sea. But first the crew must aid the cartel on a daring raid to plunder a convoy of trucks. 
 
Meanwhile, Baron de Carvalho and King Billy doggedly pursue the group under the order of The Fox to capture the head of Captain Hans Tanaka. Their fate hangs in the balance when they must make a desperate decision: take their prize and square the debt or rescue Salome and take care of family.