Equitable remedies allow a contract to be set aside and the parties restored to their original positions. Rescission is available in equity when a contract is void ab initio, treating the contract as if it never existed. Equitable rescission aims to deliver practical justice by compensating losses rather than punishing wrongdoers, and seeks to restore parties to their pre-contract positions through remedies like indemnity and accounts of profit. However, rescission may be barred if restitution is impossible or the rights of innocent third parties would be impaired.