Hermione is dying and a bizarre ritual might be the only thing that saves her. But a forged dyad with Harry isn't quite strong enough to keep the curse at bay. A triad, however, will do the trick. But not just any triad, no. One comprised of familial magic seems to be just what they need and there's only one relative of his left for them to ask. James.
When the Ministry of Magic enforces a long forgotten law, Hermione never thought she'd be assigned to two wizards—let alone her best friend and his father.