Legal malpractice is negligence law wearing a very particular costume, and the costume is what makes it hard. This article walks the claim element by element and explains why the fourth element defeats most of them. It covers how the attorney-client relationship forms without a fee or an engagement letter, the narrow circumstances in which a non-client can sue, why a violation of the Rules of Professional Conduct is evidence rather than negligence per se, and why almost every case requires an expert. It then takes on the case within a case, the requirement that a plaintiff prove they would have won the underlying matter, and its transactional cousin, and the collectibility problem that has ended many technically valid claims. Later sections cover damages and fee forfeiture, the accrual rules that vary wildly by state, the defenses that actually work including judgmental immunity and the actual innocence rule in criminal matters, where claims empirically come from, and the claims-made insurance policy whose reporting requirements have destroyed more coverage than any exclusion.