After Roman failed to pay off his debts to their group, Anton and his boss spent days searching for him, until he was found and captured by Alik and Sasho. Anton was present as Roman confessed that he hadn't gotten the money yet, upon which Mishka executed him and decreed that Roman's brother Petro would pay it off instead.
The next evening, Petro and his friend "Borys" met at Mishka's warehouse to deliver a stolen container of methylamine as agreed. However, Anton was ordered to take the two men hostage when Mishka recognized Borys as Jack Bauer. (Underground#1)
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