Sarah (Mia Farrow), a young woman who has been recently blinded in a horse-riding accident, lives with her uncle George (Robin Bailey), her aunt Betty (Dorothy Alison), and her cousin Sandy (Diane Grayson). While Sarah is out with her boyfriend Steve (Norman Eshley), a maniac enters the house and murders everyone in it. But the killer accidentally left a bracelet that could be used to identify him, so he comes back to retrieve the bracelet and kill Sarah.
See No Evil contains examples of:
- Agony of the Feet: During the first attack, the killer breaks some glass in the kitchen. Sarah walks past it in socks or bare feet several times and is lucky enough to avoid it, but after the killer comes back, Sarah steps on the glass while fleeing him and injures her foot.
- Big "NO!": Sarah screams "NOOOO!" three times after she finds Sandy's body.
- Deadly Bath: Narrowly averted in the climax. Sarah, thinking she's safe now, takes a bath. Jacko (Paul Nicholas) sneaks into the bathroom and starts going through her clothes, looking for the bracelet. Sarah reaches out and touches Jacko's hand. Then Jacko shoves her underwater and almost drowns her before Steve runs into the bathroom and beats Jacko up.
- Dramatic Irony: Sarah comes home unaware that everyone in the house has been murdered. She spends the next day or so walking around the house past corpses that the audience can see but she can't. She doesn't realise anything is wrong until she tries to take a bath and finds George's body in the tub.
- Feet-First Introduction: The first shot of the killer is of his feet walking out of a movie theatre. For most of the movie, he's only shown from the chest down and is recognizable because of his cowboy boots.
- Noodle Incident: Early in the movie, George tries to tell a story about something the doctor did when he was in hospital having his appendix out. Betty interrupts, 'We don't want to hear that revolting story again.' George says, 'It isn't that one. It's the one about the food.' We never learn the details of either incident.
- Sense Loss Sadness: Sarah tells Sandy that being blind is 'bloody awful.'
- Staircase Tumble: One room of Sarah's home has three identical doors. The one on the left leads to the kitchen, and the one in the middle leads to the basement. While Sarah is running from the killer, she opens the wrong door and falls down the basement stairs.
- Watch Out for That Tree!: Sarah tries to escape from the property on horseback, but gets knocked to the ground by a branch. The horse goes on its way, leaving Sarah alone in the forest.
