On a motion to vacate a default, the standard is a reasonable excuse; plausibility is insufficient. Here, the moving defendant's one-sided understanding that plaintiffs would refrain from prosecuting their lawsuit while another defendant negotiated its sale is not a reasonable excuse for failing to answer.
Kowal v. JackFromBrooklyn Inc., NY Slip Op 02715 (1st Dep't May 7, 2020)
Here is the decision.