Le papillon

Sam and Julia discover a mysterious object buried in the ground. A human dice? What could it be used for? No one knows what it's used for among mice.

The feather of a rare bird brought back from Julia's island escapes her hands and flies into the stairwell. A chase ensues on the various air currents.

Suspecting that the other's life would suit them better, Sam and Julia swap homes for a few hours. But is someone else's life really more enviable than their own?

Sam becomes convinced that Julia admires his big brother Dan more than she does him. He tries to change his behavior and personality, but is this really a good idea?

Julia has caught 'la souricelle' - chickenpox for mice. Contagious, she can no longer see Sam and is very bored.