兰兰和冬冬是一对姐弟,她们在上海康健幼儿园,父母在北京工作。一天,幼儿园老师告诉兰兰和冬冬她们的妈妈要接他们回去,姐弟俩十分高兴,但由于妈妈工作忙,幼儿园只得请铁路代为运送,铁路局安排郑大光来照顾他们。。This incisive, urgent documentary examines the history of anti-Black racism in hockey, from the segregated leagues of the 19th century to professional leagues today, where Black athletes continue to struggle against bigotry.。