The Myth Live nightclub is suing the city of Maplewood, alleging that an action plan imposed by the city in the wake of a heightened number of police calls is “unlawful, arbitrary” and threatens “the very existence of Myth and its business.”

The suit, filed Friday in Ramsey County District Court, asks a judge to declare the plan unconstitutional and unenforceable.

The litigation prompted the Maplewood City Council to scuttle plans at its Monday evening meeting to discuss police calls to the nightclub.

Maplewood spokesman Joe Sheeran said Tuesday that city officials were “disappointed” by the lawsuit.

According to a new report compiled by the Police Department, calls to the club have dropped since the City Council ordered club managers last spring to clean up their act or risk losing their liquor license.

“We felt … that because of the cooperation through the plan, progress was being made to ensure safer operations and wider community safety,” Sheeran said. He declined to comment further.

Eight emergency calls for service and no arrests were made at the club between June 1 and Sept. 11, the report said.

In April, city leaders ordered Myth managers to comply with an operational action plan drafted by Police Chief Scott Nadeau after a spate of violent episodes and drug overdoses.

Police had responded to more than 260 calls for service at the club in the previous two years, including a shooting, sexual assaults, brawls and 30 drug and alcohol overdoses.

The plan seemed to be working, according to the city’s report.

“There have been no problems in conforming Myth’s business practices to be in compliance with the operational action plan,” Nadeau wrote in his report to the council.

The eight emergency calls made this summer at the club included two about intoxicated people, two about people injured in a fall, and one each of criminal sexual conduct in a bathroom, a fight among patrons jockeying for spots at a show, a lost ID and a misdial.

The club keeps video recordings for seven days, but Nadeau recommended that period be increased to 90 days. The sexual misconduct report was made well after the victim said it occurred on July 30.