Mxy returns and explains Nyxly's dark history to the super team in the best way he knows how -- in song form; Lena visits her mother's birthplace in Newfoundland, eager to dig into her past.
Supergirl and team race Nyxly for control of a magical totem that controls courage; Lena struggles to make sense of her newfound gift.
Kelly is horrified when the Ormfell building implodes, injuring many in the community; Kelly embraces her power and fully steps into her role as Guardian.
Supergirl continues to fight Nyxly for the remaining totems, but after Nyxly kidnaps William, Supergirl realises she needs to take a more proactive stance to keep National City safe; Alex faces the biggest challenge of her life.
Supergirl is joined by familiar faces from the past to help her stop Lex and Nyxly for good; Alex and Kelly prepare to walk down the aisle.