There are many conspiracies in the plot of Serial Experiments Lain, as well as many conspiracy theories alluded to.
Conspiracies in SEL
- Lain's "family", who are not really her relatives
- Masami Eiri's modification of Protocol 7, Psyche, the Schumann Resonances
- KIDS, a project that harnesses children's latent psychic abilities through PHANTOMa
- Knights of the Eastern Calculus, a secret organisation
- Men in Black
- The incarnation of Lain Iwakura into reality