Jǐ ge dàchén ànzhōng túmóu-bùguǐ, xiǎng tuīfān huángdì.
Several ministers were secretly plotting treason, hoping to overthrow the emperor.
Tips
usage
不轨 is "off the track" (轨 is a rut or rail), so outside the law. In the old histories it meant plotting against the ruler; today it covers any sinister scheme, and in news reports it describes suspicious behaviour.