11at the age of 1988, allen (grant gustin) GrantGustin the mother of the mother died mysteriously, while his father was regarded as a murderer aaa。 afterwards, detective joe (jesse martin JesseL.Martin played by) take in the lonely allen. under the influence of joe, allen became an adult CSI as the forensic analyst, he has never given up on investigating the real cause of his mother's death in the process. allen is very obsessed with scientist harrison (tom gavana) TomCavanagh the particle accelerator studied by the study of the ) however, an accident caused the accelerator to explode, and allen was hit and fell into a coma. nine months later, alan, who finally woke up, was surprised to find that there was a magical change in his body, and thus gained special abilities. as time went by, allen began to understand that there were many people in this world who had super powers like him, and protecting the safety of citizens became his new responsibility and task.