Years ago,
Deathstroke (Slade Wilson) and his son
Grant Wilson were fighting against the
Teen Titans (
Robin,
Wally West / Kid Flash,
Garth,
Red Arrow,
Wonder Girl, and
Omen) when Grant suddenly had a heart attack and died despite Kid Flash's efforts to save him. Deathstroke blames Grant's death on the Titans and tells them they will all pay. In the present, the Titans are fighting against henchmen hired by Deathstroke in
New York when Wally West is captured. Slade offers Wally a deal: help him go back in time and save his son, and he will stop being Deathstroke. Wally refuses, so Slade recruits an imprisoned
Kid Flash (Ace West) in his place. The Teen Titans (
Damian Wayne,
Aqualad,
Starfire,
Raven, and
Beast Boy) realize Kid Flash is missing when his tracer is found on Damian's costume. The Titans and the Teen Titans work together to find the two Flashes. Deathstroke successfully persuades Kid Flash to help him go back in time to save his son. When the Titans and Teen Titans arrive, Deathstroke absorbs some of Kid Flash's speed. Wally chases after Slade, and Slade reveals to him that in the past, Slade made a truce with
Dick Grayson. If he trained
Rose Wilson to be a hero with his morals, then Slade would not attack the original Teen Titans, calling it a Lazarus Contract. If Dick refused or failed to teach Rose, Slade would try to kill the Titans once again. The two teams try to find Deathstroke, leaving Kid Flash and
Aqualad behind. Deathstroke travels to the past and confronts Grant, who is horrified to learn that his idol is his father who left him when he was young. Wally West,
Jericho, Raven, and Starfire combine their powers to create a time vortex that allows the Titans to travel to the past. Damian uses a palm technique called
commotio cordis on past Wally West to make his heart stop. This will cause current Wally to start fading, which means Deathstroke will lose his super speed. In the past, Grant Wilson vanishes in front of Deathstroke. Ace gets his speed back and past Wally recovers, destroying the time vortex. Deathstroke arrives in the present and plans to go into the
Speed Force to go even farther back in time, and after he is done he will kill everyone. The adult Wally appears again and tells everyone that if Deathstroke goes into the Speed Force, he will be unable to escape due to his inexperience. Wally rescues Slade, who explains that he saw things in the Speed Force that the Titans would not understand and has lost his drive to kill them. Deathstroke drops his sword and mask and walks away. In the epilogue, Damian fires Kid Flash because he trusted Deathstroke and nearly put innocent lives at risk. Wally is left weakened by his experiences, leaving him unable to run as fast and forced to use a
pacemaker. Deathstroke decides to create his own version of the Teen Titans that includes
Wintergreen, Jericho, and Rose Wilson. == Reception ==