Barry and Iris plan a romantic dinner for Valentine's Day but their evening is interrupted by an old foe – Amunet. Meanwhile, Frost gets into the holiday spirit and attempts to help Allegra reconnect with an old love.

Feeling overwhelmed with all the changes since Crisis, Barry conducts an experiment that goes awry and puts him directly in Gorilla Grodd's path. Expecting the worst, Barry is surprised when Grodd asks for his help. Unfortunately for both The Flash and Grodd, things get worse when another villain appears – Solovar. Meanwhile, Iris works with Eva to escape the Mirrorverse.