1988, a 7 1 year-old Danish doctor died in the cinema because of insufficient blood supply to his head while watching a comedy movie many times. The movie he saw was a fish named Wanda.

A fish named Wanda England 1988

Ken, Otto and George are going to rob a priceless diamond in a jewelry store in London, and George's lover Wanda is also involved. They pretended to be brother and sister. Ken, who stutters a little, likes to raise fish and names his favorite fish "Wanda". The four men successfully committed the crime, but when they left the scene, an old woman walking her dog met George.

Otto and Wanda want to keep the diamonds for themselves. They turned George in. Although George was arrested, he moved the diamond first and hid the key. Otto and Wanda were in vain. Unwilling Wanda thought that George's defense lawyer Leach might know more, so he took the opportunity to approach Leach, which made this usually stuffy lawyer fidgety and unable to extricate himself.

In prison, George ordered Ken to murder the old lady who recognized him. Ken failed to kill three puppies in a row, but the old lady died of a heart attack. The death of the witness means that the day when George is released from prison is not far away. Wanda found his good side in her contact with Leech, and she began to like him. They began to fall in love.

In order to get the key, Otto extorted a confession from Ken and ate his beloved fish in front of him, but still found nothing. Wanda got the key, so she betrayed George in court. The diamonds she took were ready to escape. Otto cheated her at the airport. Leach, who arrived in time, killed Otto with Ken's help. He got on the plane and flew away with Wanda.