On the streets of Tong'an, Xiamen, late at night, Chen Zewen has just ended a three-year relationship. Drinking to drown his sorrows outside the Tuhu Auto Care shop he runs, he gets utterly drunk and collapses by the roadside. Liu Shiwen, just off work, happens upon him and rescues him. Standing 165 centimeters tall with a graceful figure, Liu Shiwen favors sheer black stockings and 8-centimeter heels. She works at a KTV and appears dazzling and bold, but beneath that exterior, she is pure-hearted and gentle.
The Tuhu Auto Care shop, surrounded by grease and machinery, gradually comes to welcome Liu Shiwen's presence. She moves through it in different pairs of stockings, becoming the gentlest light in the tough, rugged shop. Chen Zewen falls deeply for her warmth and bravely confesses his feelings, but Liu Shiwen, wary of society's prejudice against her line of work, turns him down. Their sincerity eventually breaks down the barriers between them, and they fall in love. But when Chen Zewen's family learns what she does for a living, they strongly oppose the relationship and pressure him to break up with her.
Determined to protect their love, Chen Zewen comes to blows with his family, even breaking with them. Seeing how torn he is, Liu Shiwen cannot bear to put him in such a position and decides to leave without a word. Under the pretext of a farewell, she invites Chen Zewen to her rented room. Dressed to the nines, she drinks with him and gives him her heart and her first time, then slips away in the night, leaving behind a heart-shaped farewell letter.
Devastated by the loss of his beloved, Chen Zewen searches frantically through every street and alley in Tong'an. After six months of dogged searching, he finally meets her again at a flower shop in Hui Jing Plaza, Xiang'an. The girl has left her old life behind and is quietly tending to the flowers. This time, they overcome society's obstacles and win their families' blessings. Amid the warmth and bustle of Tong'an, they stay hand in hand, marry, and have children. The faint glimmer of black stockings in the night becomes the warm refuge of a lifetime.
