Alice and Seth are a perfect love story: the handsome doctor and his beautiful fiancée. They're wealthy, well liked and made for each other--the envy of all their friends. Alice can't wait for the day of their dream wedding. But when she arrives at the altar, she doesn't recognise the man waiting to marry her.

When this stranger insists he's Seth, her husband-to-be, the entire congregation seems to agree. Even her parents try to persuade Alice to go through with the wedding.

As panic sets in, Alice's world comes apart. Where is the real Seth, and why have all traces of him disappeared from her life? Fearing she's losing her mind, she sets out to uncover the truth and escape the nightmare she's living in. But with everyone around her convinced by the fake Seth, how can she ever hope to find the man she loves?