Supergirl and team must stop Nyxly from vanquishing a familiarface from Supergirl's past - Mr. Mxyzptlk. Mxy returns andexplains Nyxly's dark history to the super team in the best wayhe knows how - in song form. Meanwhile, Lena visits hermother's birthplace in Newfoundland, eager to dig into herpast but is shocked by the small town's icy reception towardsher.
