The case involves former Arena Group executive Andrew Kraft, who sued the company for breach of contract after his termination. Kraft alleged that Arena failed to provide severance benefits required by his employment agreement for terminations without cause. Arena counterclaimed for breach of fiduciary duty and fraud, asserting that Kraft was terminated for cause.

The court held that the burden falls on the plaintiff to prove by a preponderance of the evidence that his termination was without cause. Judge Liman reasoned that the absence of cause is a condition precedent to Kraft's entitlement to severance, not an affirmative defense for the employer to disprove.

The court distinguished at-will employment from fixed-term contracts, noting that while an employer must prove cause to defend against a wrongful termination claim in the latter context, an at-will employee cannot challenge the fact of their own termination. Instead, the employee must prove they satisfy the condition precedent for additional benefits like severance.

On Arena's counterclaim, the court addressed a split in New York law regarding the faithless servant doctrine. The dispute centered on whether forfeiture requires "substantial" misconduct under the Turner standard or if any breach of loyalty triggers forfeiture under the Murray standard.

Judge Liman adopted the Restatement (Third) of Agency's approach for jury instructions, ruling that forfeiture is appropriate if the breach tainted all of the agent's work during the period of disloyalty. The court clarified that substantiality is measured by the reach of the breach rather than its gravity, and even a single faithless act may be deemed substantial if it cannot be segregated from the agent's work.