However, his plans turned sour when the experimental droid B-1D4, carrier of The Heart of Steel virus, was caught in a battle and salvaged by Dilrath, a Skrilling junk merchant. Tracking B-1D4 there, 4-8C discovered that the droid had in fact been sold to one Captain Han Solo, a Rebel sympathizer. 4-8C then enlisted the help of Captain Kassihm and journeyed to Dweem, believing that Solo had fled there. The expedition proved to be uneventful, and 4-8C surmised that B-1D4 had in fact hijacked the Millennium Falcon and taken it to Imperial Center. There, The Heart of Steel deactivated the planetary defenses, causing havoc at the capital. Realizing that his project could be jeopardized, he raced to Merakai, where Solo and the droid were being held. 4-8C broke into the prison, started a riot, a