Last fall, as restructuring lawyers at Kirkland & Ellis were preparing a Chapter 11 bankruptcy filing for Rite Aid, the retail pharmacy chain faced a significant dispute with McKesson, the supplier of more than 90% of its drugs. In essence, McKesson took the position that the bankruptcy filing changed the terms of its deal with Rite Aid. 

So, as lawyers from the restructuring team were flying to New Jersey to prepare for the Sunday bankruptcy filing, members of the litigation team raced to pull together a temporary restraining order to file against the company's single largest supplier.