At home, Joe is preparing for Christmas, the detective is called to work.
Iris and Barry give themselves Christmas presents, the girl gets a replica of the mother's wedding ring in the form of a necklace.
Barry prepares gifts for her friends from Star Labs.
Wells is not delighted with Christmas, it turns out that the explosion occurred before Christmas.
Eddie gives Iris the key to her apartment for Christmas.
Meanwhile, a yellow spot appears in the city - Reverse-Flash, the murderer of Barry's mother.
Everyone is wondering how to catch him, ask Dr.
Christin McGee for help.
Caitlin is not present, he tells Cisco he knows that Ronnie Raymond is alive because she saw him.
Meanwhile, Barry remembers the events of 14 years ago, when his mother was murdered, and his father accused of this murder, remembers a man in a yellow dress, suddenly appears Iris, who came to show that he would live with Eddie.
Flash encounters Reverse Flash, behind which he rushes to find out why he killed his mother.
It turns out that Reverse Flash is much faster than him.
Barry comes to Star Labs talking about Reverse Dr.
Wells and Joe.
Dr Christina McGee refuses to help the police, she finally agrees to provide them with a prototype.
Eddie wants to catch Flash at all costs, informs Joe, who is worried.
Cisco helps Caitlin find her fiancée Ronnie, who died in an accident, when in the end they find a man, it turns out that he is not Ronnie but someone else.
Barry goes to prison to visit his father, saying he found his mother's killer, the boy promises to get his father out of jail and beat a guy in a yellow suit.
Barry admits the love of Iris.
Reverse arrives at Star Labs, Joe wants answers for why he killed Nora Allen.
Reverse takes Wells, which is very turbulent.
Joe and Barry return home, where Iris and Eddie, Caitlin and Cisco are already waiting.
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