"Your girls that you all love are mine already! Through them, you and others shall yet be mine, my creatures, to do my bidding and to be my jackals when I want to feed!"
Mina slowly succumbs to the blood of the vampire that flows through her veins, switching back and forth from a state of consciousness to a state of semi-trance during which she is telepathically connected with Dracula. It is this connection that they start to use to deduce Dracula's movements. It is only possible to detect Dracula's surroundings when Mina is put under hypnosis by Van Helsing. This ability gradually gets weaker as the group makes their way to Dracula's castle.
Dracula flees back to his castle in Transylvania, followed by Van Helsing's group, who manage to track him down just before sundown and destroy him by shearing "through the throat" with a knife and stabbing him in the heart also with a knife. Dracula crumbles to dust, his spell is lifted and Mina is freed from the marks. Quincey Morris is killed in the final battle, stabbed by Gypsies who had been charged with returning Dracula to his castle; the survivors return to England.
The book closes with a note about Mina's and Jonathan's married life and the birth of their first-born son, whom they name after all four members of the party, but refer to only as Quincey in remembrance of their American friend.