Melith Sebright is the lone survivor of the Andromeda Power Rangers. After the defeat of Sorrid Sovereign the very people she defended attempted to take her down. Now she's back for revenge.

The United Alliance of Evil has returned under the reign of the mysterious Dark Infinus. Thankfully Hexagon is ready with a new team of Rangers that call upon the powers of the past to fight the UAE and keep the galaxy safe from the growing evil. Together with a plethora of past Rangers, the Zenith team will protect the planet against Infinus and his legion of darkness.