阿佩（林嘉欣 饰）在一间贸易公司的市场推广小组工作，小组组长是汤少（郑伊健 饰），贪玩的珠珠(活己岚饰)、羞涩的松仔(曾国祥 饰)、处事老练的球叔(骆应钧饰)也是小组同事。在小小办公室中日日相处，阿佩对汤少产生了不同于别人的情愫，而汤少却已有家室，对阿佩若即若离，阿佩也越来越深陷于这场还没开始的爱恋中，看不穿汤少的心意，也怀疑自己的爱恋。这一切到底是阿佩一厢情愿的单恋？还是两人的情投意合？ 　　凭借这部《亲密》林嘉欣夺得第3届韩国首尔忠武路电影展最佳女主角，岸西夺得15届香港电影评论学会奖最佳编剧奖和10届华语电影传媒大奖最佳新导演奖。

Pearl has quietly fallen in love with her boss Tom, who’s married with a family. Without warning, Tom asks Pearl to interview for another job. Wounded, Pearl demands that Tom terminate her. The gauntlet has been thrown down. In a space as small, crowded and claustrophobic as the office, love doesn’t grow - it incubates and breeds, like a virus.