Oskar and Leo are four-year-old twins. Oskar has been deaf since birth while Leo's hearing is perfect. Both boys have grown up learning sign language.

The director of this documentary is also fluent in sign language, allowing him to interact directly with the young brothers and closely document their discoveries and learning processes.

This film explores what the diagnosis 'deaf' means to Oskar's hearing parents. Sandra and Stefan. Two parents. Two different reactions. And the challenge of raising the whole family in a foreign language.