秋去春來，候鳥南遷，許多生命的嬗遞，正悄然無聲地在台北溼地裡進行著。讀書時就離開老家雲林北上，在台北定居的鳥類專家林家民（溫昇豪 飾），渴望如候鳥擁有自在遨翔的天空，但現實生活中卻陷入家庭與親情的困境。家民過於專注候鳥育雛工作，加上妻子（白歆惠 飾）對於懷孕的期待始終落空，使得夫妻間的婚姻關係日益緊張；而家民和在老家的弟弟家雄（莊凱勛 飾）冷戰多年，始終無解。就在候鳥來臨的時節，兄弟多年來藏在心中的芥蒂，夫妻間逐漸增加的爭執，一切衝突驟然爆開……。

On the surface, Min is a man who lives a dream life. He has great looks, a job he is passionate about at the Taipei wild bird conservatory and a loving wife. However, the expert of the Black-winged Stilt harbours dark storms within. There is daily growing tension between him and his wife over family planning. He and his brother, who were once in good terms, have been cold-shouldering each other for years. Last is the past he left behind to soar to where he is. All tension is released and mayhem unleashed when a crisis brings him back to his old home Yun-Ling, the town he came from. Meanwhile, oblivious to the life of the man who studies them, the migratory Stilts continue their annual ritual. Hidden with their feathery actions is a message of love waiting for Min and his family to uncover.