To not burden their impoverished parents, two siblings decide to share a pair of shoes after the brother loses the sister's. While this turns out to be more difficult than they imagined but fate offers a chance in the form of a marathon.
程时念留学前，与司北渊无意发生一夜情，六年后，程时念带着儿子回国，成为司北渊的秘书，得知他已经有了未婚妻。深思熟虑后，程时念决定成全司北渊，却发现司北渊的未婚妻，正是冒名顶替自己身份的闺蜜乔若安………
