Anna works as a translator in a German NATO-sponsored training camp for Ukrainian soldiers. On the first day of summer, a new platoon arrives to the camp and among them she encounters her adoptive sister Valeriya. Feeling guilt stricken for leaving her family in times of need and realizing that she only has a limited time of 30 days to spend with her sister, Anna decides that she wants to take this opportunity and fix her broken relationship with Valeriya, whatever the cost may be.