The lawsuit, which has been obtained by TMZ (PDF), accuses Couture of conspiracy and says, "Couture devised and began implementing a tortious scheme and artifice whereby he and others acting on his behalf would fabricate a false and fictitious history of events in which Couture was purportedly lied to and otherwise personally abused."
Per TMZ, UFC says Couture lied when he claimed he was not paid a signing bonus and that fighters were paid bonuses "under the table."
UFC also says Couture violated his contract by saying he would promote a team in the International Fighting League. UFC seeks damages in excess of $50,000 in the suit, but what it really wants is to get Couture back into the Octagon. UFC is, it stands to reason, hoping a settlement of the suit might bring Couture back into its stable.