The IKS Qu' was an alternate universe's version of the USS Enterprise-E. In this reality, Jean-Luc Picard is a slave and all of his crew were executed by the Klingons who now use his ship as their own. The ship was a UESPA ship before its capture. William Riker's throat was cut, Data disassembled, Geordi La Forge was gutted, Tasha Yar was shot while attempting escape, Deanna Troi and Beverly Crusher were violated and then strangled. Argyle was decapitated. General Worf is in command. (TNG novel: Q & A)

Interestingly, the Klingon word Qu' actually does translate as: duty, obligation, or even enterprise...