The winner of this year's Caine Prize for African Writing will be announced next week.

Nigerian writer Lesley Nneka Arimah is among the five shortlisted authors. Her short story, What it Means When a Man Falls from the Sky, follows a mathematician called Nneoma who asks if there is any way to calculate the size of human grief.

The BBC's Kim Chakanetsa reads an excerpt.

(Photo and credit: Lesley Nneka Arimah)