Lisa, from the United States, is a shoe designer, married for 25 years to Peter Ryman, a software CEO from Northern Ireland.

Peter discovers a romantic voicemail on Lisa's cell phone and a similar email on her computer from "Ralph", as well as a password-protected folder named "Love".

Ralph excitedly informs Peter, who gives him money to throw Lisa a lavish dinner party in London to seal their relationship.

Admitting that his pretensions of wealth are a lie, Ralph explains that Lisa knew the truth and paid off his debts, declaring that she truly loved him, and Peter leaves.

Back home, Peter decides to attend the dinner Ralph has arranged to celebrate Lisa, and invites Abigail and George.

With Lisa's friends and loved ones gathered, Peter swallows his anger at Ralph and gives a heartfelt toast to his wife's memory, reconciling with Abigail and finally welcoming George to their family.

As Ralph starts a new life as a hospital orderly in London, Peter and Abigail – having finally found closure in Lisa's death – return home.