Penguins of Madagascar fanfic: 

After the death of a loved one, the mourning team come across an old code of Manfredi's which leads them on a new mission. Meanwhile, the story of that happened on their Guatemala mission will unfold.

Disclaimer: Since the canon Manfredi and Johnson were disappointing in the episode ​The Penguin Who Loved Me, I have written them like I had imagined them up until that point with a few shared details.