Charlie is poisoned and dies in the bathtub in her hotel room at around 10 pm. There is a smashed wine glass on the floor which she must have dropped when she died. Charlie was on Holiday on a small island in the Caribbean.
When the detective searches Charlies hotel room they find letters in the bin addressed to Charlies mum who lives on the island. Charlie was writing them before she want into the bath. Charlie was telling her mum she was going to give her a lot of money but she did not say why.
The detectives decided to interview Charlies mum. She said that Charlie was staying on the island to visit her friend that worked at the hotel. Then Charlies mum told the detective that her and Charlie had recently had an argument because she had found out that Charlie was having an affair with her boyfriend. She thinks Charlie was giving her the money because she felt bad.
The detective asks Charlies friend (Daizie) about Charlies argument with her mum and she tells them that Charlie never had an affair with her mums boyfriend and that it was the other way round, Charlies mum had an affair with Charlies boyfriend. The detective searches Daizies room and finds papers saying Daizie owes a lot of money to the bank because of the amount of operations on her leg and she is struggling to pay it off.
The detective checks the CCTV on the night of the murder. Charlies mum arrives carrying a bottle of wine her, knocks on Charlies door and speaks to Charlie. Daizie is walking past on her way to a persons room to deliver some strong medicine and hears Charlie saying that she is going to give the money to her mum instead of Daizie. Daizie thinks fast and opens Charlies door to her room and goes inside. She hears Charlie coming and runs out the room without her usual limp.
The detective gathered everyone together and told them what had happened. Daizie had lied to Charlie saying she was injured and struggling to pay for treatment so she could ask for money. Charlie had spotted Daizie walking without her crutches, so she decided to give her mum the money to apologize for having an affair with her mums boyfriend. She told her mum she would send it to her via letter. Charlie got so angry, she decided to kill Charlie, so she put a fatal dose of the medicine in her hands on the stamps in Charlies room, killing her.