As The World Caves In

What happens if the peaky blinders, Lee family and the Hargreeves family were send to watch someone they loved? Peaky Blinders got to watch the life of John's future wife while the Lee family got to watch the life of a girl they took in that they seem as a daughter/sister. And the Hargreeves get to watch the life of their little sister. Will they understand her and change a few things from happening or will it all follow through?

The Umbrella Academy x Peaky Blinders
Oc Hargreeves x John Shelby