Marlin, a father, comes home to find his wife and countless babies missing. He is left with one - little nemo.

A mother bird comes back to find that her nest has fallen. Out of her five little babybirds, one survives.

In that transition from countless, from many to one - how do they find the strength to go on? Because of the one? What if even that one were taken away - mother bird finds all asleep - would herself constitute the one to live for?

Or something else?