Rome, Paris and Helsinki right after the Madrid bombings. Three stories about people who, for different reasons, are afraid of others – the eponymous "thy neighbor." A humanity full of differences, but at the same time, with very similar feelings. So similar that their stories appear almost parallel and complementary.

Celestine is a little mouse trying to avoid a dental career while Ernest is a big bear craving an artistic outlet. When Celestine meets Ernest, they overcome their natural enmity by forging a life of crime together.

The dream of Charles Dombais, the wealthy owner of the shipping company, is to have a son to continue his business. Tragically, his wife dies shortly after giving birth to their son.

A hot, slow summer day. Young people and adults seek to kill time, in cafés or in the streets. Three teenagers find bones by chance.