三十年前，悍匪葉嘯天於一宗械劫案被捕而入獄。當年曾為嘯天接贓的女兒改名換姓，以張心月之名重新生活，並嫁予遊艇大王殷昊然；另邊廂，因劫案喪命的同黨遺下兒子莊子喬，幸得好心人鄧承謙收養。一宗車禍令子喬、心月再次相遇，車禍的矛頭卻直指剛出獄的嘯天！心月無法再逃避嘯天這個夢魘，婚姻關係也出現危機。警察楊忻曉介入調查，更對嘯天、子喬死咬不放。三十年的恩怨重新掀起，當年牽涉劫案的所有人，都被捲進漩渦當中……
Thirty years ago, hardened criminal Yip Siu-tin is arrested for armed robbery and sentenced to prison. Siu-tin’s daughter, who has handled the loot, changes her name to Cheung Sum-yuet and starts a new life. She also gets married to yacht company boss Yen Ho-yin. Meanwhile, Chong Chi-kiu is a kid left behind by an accomplice who has died because of the robbery. Kind-hearted Tang Sing-him becomes his foster parent. A traffic accident causes Chi-kiu and Sum-yuet to run into each other again. But this accident somehow has something to do with Siu-tin, who is just released from prison. Sum-yuet can no longer avoid Siu-tin, who is a nightmare to her. Her marriage also has certain issues. Police officer Yeung Yan-hiu intervenes by launching an investigation, and she keeps going after Siu-tin and Chi-kiu. Unresolved grudges for thirty years are again put on the front burner. Everyone implicated in a robbery of yesteryear is drawn into this mess.
庄子乔（陈展鹏饰）和张心月（黄智雯饰）是儿时朋友，因为彼此父亲犯下罪行，他们走上了截然不同的道路。月在父亲入狱后，改名换姓，希望重过新生，即使结婚生女，也绝口不提自己的往事。乔则视父亲为反面教材，誓言不会重蹈上一代覆辙，选择以保险调查员为职业。
两人久未见面，因为一份一千万的人寿保险而重遇。月的丈夫殷昊然意外身亡，然于数月前增加保额，而意外发生前又得悉月的身世，令乔怀疑这不是一宗意外……然的母亲亦对月有所怀疑，遂向女警杨忻晓（汤洛雯饰）求助，晓揭发月和乔的身世，原来晓是当年案件的受害者之一。此时，另一宗死亡事件发生……
错误虽然发生，但只要找到隐门，就必有出路。
