The former chair of Dentons’ government contracts group, Jessica Abrahams, claims in a lawsuit that the megafirm owes her close to $400,000 and that it bad-mouthed her to clients when she left the firm.

Dentons counters that Abrahams left with nearly $2 million in unpaid billings when she departed for Drinker Biddle & Reath a year ago, calling her suit a “diversion” from her own failures to meet her commitments to the firm.