
A week ago, Eames had failed to check in after a routine job.
Three days later Arthur had received a message from some representatives of Cobol Engineering, they had the Forger, and they were willing to make a trade, after all, Eames wasn't the one they ultimately wanted, simply a means to an end. At the time, Arthur had disregarded the message, suspecting that it was either a convenient ploy, or that Eames would break himself out soon enough.
He did, however, set about tracking the origins of the message, just in case. Two days later, and still no word from Eames, and then, the day before, he'd gotten another message from Cobol, a much clearer threat this time, and even through the screaming, he still heard Eames' pained: "Don't listen to them, Arthur."
Several years ago, Arthur had made himself several promises about the nature of what he was, and what he would and wouldn't do. Eames' tone was all he needed to decide to break them all. Whatever they were doing to the Forger, whatever they had done, they were going to pay for it, an eye for an eye.