Seven identifies the weapon as the work of Species 4672, which no longer exists. Janeway attacks the weapon to try and distract it from its destructive efforts.
Cover misprint states one of four issues.
Old tricks Voyager fails to stop the ancient weapon from destroying a planetary system. While repairs are made, Harry searches Starfleet records and finds Kirk's encounter with the doomsday machine. With knowledge of the previous encounter, Janeway approves a new plan to destroy the weapon. Nanoprobes might be the answer, but delivering them to the doomsday machine is no easy task.