Clark must find an antidote to a deadly truth serum before Chloe figures out his secret or dies.
Scared and confused, Elsa creates a snow monster for protection; Regina wonders if Marian means the end of her happy-ever-after; Hook is upset to realize Emma seems to be avoiding him; Anna discovers new information about her parents.
The heroes pick up the pieces in the wake of the Snow Queen's spell; Regina must make a difficult choice; Gold's quest for power threatens everything he cares about.
Mr. Gold asks David for help jogging Belle's memory; Anton's magic beans begin to grow; Rumplestiltskin goes after a thief.
The town blames Elsa when a fatal icy spell is cast on Marian, not knowing that another resident has the same powers; Mary Margaret struggles to balance motherhood and leading the town.