This essay takes up conspiracy as a discursive, political, and philosophical concept. By tracing the ideological and textual kinship between anticolonialism in India and Ireland and radicalism in the United States, it illuminates transcolonial circuits of a curiously shared revolutionary project. Rather than simply offer a historical account of those interconnections, it theorizes a practice of reading revolutionary violence as perpetual, repetitive haunting, a politics of the undead. It argues for a historiographical live burial by which violences of the past reappear to disrupt the imperial promise of futurity and continuity. From the 1916 “Hindu-German Conspiracy Trial” in San Francisco, during which members of the Ghadr Party—consisting of diasporic Indian students at the University of California, Berkeley, and Punjabi farmers in the Central Valley—were accused of conspiring with German diplomats to arm anticolonial revolt in British India, this essay tracks forms of radical sympathy that emerge, flourish, and stutter in an era of ethnonationalist constriction.