post "Batman v Superman" and "Wonder Woman". Bruce and Diana's work at bringing together potential members of the fledgeling Justice League gets interrupted by old foes of the Dark Knight uniting to take control of Metropolis in the wake of Superman's fall. Will the two learn to work together well enough to bring down the darkest and most dangerous of Gotham's underworld combined?

Bruce gives Diana the best birthday gift. Diana wishes to do the same for him. *I suck at summaries* Rated M and I'll try my best to tone it down.