Infamous: Infinity is a sequel to Infamous: Second Son, although it does not follow its plotlines
Chapter I: X
X, a mutant superhuman, is created by two positive and negative ions combining through force by mutant experimentation agency, AXis. X, with the ability to absorb energy, easily takes out the members of AXis, escaping from their research facility.
Chapter II: Beat It
X meets several thugs hired by AXis to defeat him. In self defense, X absorbs the potential energy stored in their bodies, killing them. Police officers spot him and give chase. With the energy of the thugs, X accidentally causes the police officers to explode. NYPD then partners with AXis, to exterminate of X.