1. Moira wakes up Zarya to reveal she gave the Russian woman a large cock.

2. Sombra hacked CCTV and copied footage of the reveal to sell to a client.

3. Zarya sits alone in medical observation room and masturbates.

4. Sombra gives the formula she stole from Moira to her client, revealed to be Mercy.

5. Mercy records observations of her newly-formed large cock, watches secret camera footage of Pharah and Symmetra.

6. Pharah and Symmetra have lesbian sex, cumming together while scissoring.

7. Mercy sucks herself off while watching, cumming in her mouth and swallowing her own load.

8. Ana surprises Pharah by making breakfast for her and Symmetra; embarrasses both by asking if the sex is good.

9. Mercy invites Sombra to help her with an experiment; they fuck in hotel room, Mercy impregnates Sombra in mating press position.

10. Mercy treats DVa for minor cut on her arm; DVa shyly explains she's a virgin. Mercy offers to give her some experience before her first time with a man; Mercy impregnates D.Va while she's bent over a table.

11. Tracer watches Mercy fuck DVa, uses Blink to snoop around and steal some of the serum Mercy injected before-hand. Injects herself, starts to play with herself.

12. Widow walks in and taunts her, Tracer offers a challenge that she can make Widow cum before she does; Tracer impregnates Widowmaker reverse-cowgirl as Widow plays teasing domme.

13. As Pharah walks out of the shower, Symmetra walks in on her; except it's not Pharah, but Ana, with a large cock between her legs.

14. Pharah asks Mercy for relationship advice. Pharah admits she's never been with a man. Mercy offers to fuck Pharah. Mercy impregnates Pharah doggystyle.

15. Ana fucking Symmetra in Pharah's bedroom.

16. Pharah walks in as Ana impregnates Symmetra in prone-bone position.

17. Ana explains Moira experimented on her years ago in Oasis; she must be revisiting her old research again.

18. Widow steals the futa serum while Tracer is asleep.

19. Widow challenges Tracer to a rematch; Widowmaker impregnates Tracer in piledriver position.

20. In locker room, nude futa Mercy comments on Brigette's muscles. Brigette comments on Mercy's cock. Mercy impregnates Brigette in sideways standing position.

21. Moira reveals she's been constantly iterating and giving Zarya serums giving her bigger and bigger cocks.

22. Zarya has her massive cock jerked off by a machine, as Moira explains that Mercy has is trying to stop them and needs to be stopped.

23. Mercy impregnates Ashe in cowgirl position.

24. The five women Mercy fucked confront her, their pregnant bellies beginning to show. Zarya impregnates Mercy holding her completely in the air.

25. Moira recording that her serum has finally been perfected, when cyberpunk Mei claps and congratulates Moira on successfully rebuilding her research.

26. Winston recounts who impregnated whom; Ana, Mercy, Zarya, and Sombra corroborate to Winston that Moira is behind it; Winston decides they need to stop Moira before she's responsible for more 'happy accidents'.

27. Mei explains the history of her research and thanks Moira for completing it when she could not. Mei offers to give Moira the honor of being the first mother of her new army.

28. Winston et all come in as Mei fucks Moira with a cock even more massive than Zarya's. They wait and watch for the right moment to strike.

29. Mei impregnates Moira in missionary position. Winston et all come out, arresting Moira for unethical experiments and Mei for war crimes committed during the Battle of Neohong Kong.

30. Newly arrested, Mei explains the alternate history that led to this particular path, and Moira explains her part in it.

31. Winston sighs and wonders aloud what to do with the nine heavily-pregnant Overwatch ladies. Hard cut to "Overbreed" logo, final credits.