Real passions rage in mouse families. Roma, a gray mouse, fell in love with Ruza, a white and fragile mouse.
Their parents forbid them to be friends, because there are disputes between them over the place of residence in the cheese factory. Some of their enemies call them "biscuits in white powder", while others instead hear - "you are gray spades without mastic". Roma and Ruža dare to take risky actions in order to reconcile their parents and protect their feelings. After all, all lovers are very similar to each other. Even... mice.